Note4Students
From UPSC perspective, the following things are important :
Prelims level: Near Field Communication (NFC)
Mains level: Not Much
Google Pay has recently launched a new feature in India, ‘Tap to pay for UPI’, in collaboration with Pine Labs. The feature makes use of Near Field Communication (NFC) technology.
What is Near Field Communication (NFC)?
- NFC is a short-range wireless connectivity technology that allows NFC-enabled devices to communicate with each other and transfer information quickly and easily with a single touch.
- It makes possible to pay bills, exchange business cards, download coupons, or share a document.
How does it work?
- NFC transmits data through electromagnetic radio fields, to enable communication between two devices. Both devices must contain NFC chips, as transactions take place within a very short distance.
- NFC-enabled devices must be either physically touching or within a few centimetres from each other for data transfer to occur.
When did NFC tech start?
- In 2004, consumer electronics companies, Nokia, Philips and Sony together formed the NFC Forum, which outlined the architecture for NFC technology to create powerful new consumer-driven products.
- Nokia released the first NFC-enabled phone in 2007.
How will this technology work with the recently launched feature, ‘Tap to pay for UPI’?
- Google Pay has been the first among UPI apps to bring the Tap to Pay feature working on POS terminals.
- It will allow users with UPI accounts configured on Google Pay to make payments just by tapping their NFC-enabled Android smartphones on any Pine Labs Android POS terminal.
- Once users tap their phones on the POS terminal, it will automatically open the Google pay app with the payment amount pre-filled.
- Users can then verify the amount and merchant name and authenticate the payment, using their UPI PIN.
- The process is much faster compared to scanning a QR code or entering the UPI-linked mobile number which has been the conventional way till now.
What are the other applications of NFC technology?
- NFC tech has a wide range of applications besides driving payment services.
- It is used in contactless banking cards to perform money transactions or to generate contact-less tickets for public transport.
- Contactless cards and readers use NFC in several applications from securing networks and buildings to monitoring inventory and sales, preventing auto theft, keeping tabs on library books,
- NFC is behind the cards that we wave over card readers in subway turnstiles and on buses to check tickets.
- It is present in speakers, household appliances, and other electronic devices that we monitor and control through our smartphones.
- With just a touch, NFC can also set up WiFi and Bluetooth devices in our homes, investopedia noted.
- It also has an application in healthcare, to monitor patient stats through NFC-enabled wristbands.
- NFC is used in wireless charging too.
How safe is this technology?
- NFC technology is designed for an operation between devices within a few centimetres from each other.
- This makes it difficult for attackers to record the communication between the devices compared to other wireless technologies which have a working distance of several metres, according to the NFC forum, a non-profit industry association.
- The user of the NFC-enabled device determines by the touch gesture which entity the NFC communication should take place with, making it more difficult for the attacker to get connected.
- The security level of the NFC communication is by default higher compared to other wireless communication protocols.
Where does it stand in comparison to other wireless technologies?
- There are other wireless technologies available which are replacing cable-based connections.
- The IrDa technology is a short range (a few metres) connection based on the exchange of data over infrared light where the two communication devices must be positioned within a line of sight.
- Today, this technology is mainly used for remote control devices. For larger data communication with computer devices this technology was replaced by Bluetooth or WiFi connections.
- However, for these technologies’ receiver devices need their own power supply due to the larger working distance.
- Therefore, the receiving device cannot be powered by the radiofrequency (RF) field like in NFC, the NFC forum highlighted.
- Another consequence of the larger working distance is the need for the user to configure their device and to pair them together for communication.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Wheat
Mains level: Indias export of agricultural commodities
Russia and Ukraine account for about 25% of the world’s wheat exports. However, Russia’s invasion of Ukraine and the subsequent Western sanctions against Moscow have curtailed wheat supplies drastically.
India eyeing the global wheat basket
- As a result of War, many countries which were sourcing wheat mainly from these two nations are now in a dire need of alternatives.
- India, the largest wheat producer after China, is reported to be eyeing the void.
- The government plans to allow increased exports to cash in on the higher price of wheat in the international market.
- With harvesting season (March to May) coinciding with the supply crunch, a bumper crop is also expected again this year.
Global wheat scenario
- While Russia and Ukraine exported 183 million tonnes (MT) and 91 MT of wheat, respectively, between 2017 and 2021, India exported just a fraction of its output, or just 12.6 MT, in the period.
- Five other countries accounted for the bulk of wheat exports in this period, including the European Union (157 MT), the U.S. (125 MT), Canada (112 MT) and Australia (83 MT).
- India, which had the second-highest wheat supply (including production, existing stocks and imports) in this period at 613 million tonnes, exported only 2% of this, with about 80% used for domestic consumption, and the rest stored.
Impact of the war
- Many countries in Africa, West Asia and Southeast Asia rely heavily on Russian and Ukrainian wheat.
- Egypt, the biggest importer of wheat, sources 93% of its needs from the East European neighbors. Indonesia, the second-largest importer, has a 30% dependence on these two nations.
- African nations such as Sudan (60% reliance), Tanzania (64%), Libya (53%), Tunisia (52%), and West Asian countries including Lebanon (77% dependency), Yemen (50%) and the UAE (42%) are also highly dependent on supplies from the two neighbors now at war.
India’s focus markets
- India is now focussing on exporting wheat to many nations such as Egypt, Turkey, Nigeria, Algeria, West Asia, Indonesia, Vietnam, Sri Lanka, Bangladesh, Thailand, the Philippines, Morocco and Tanzania.
- To give impetus to the export promotion of wheat as well as to bring focus on the challenges and bottlenecks faced in production and export, APEDA has created a task group.
Legal hurdles over Wheat Exports
- If India decides to export wheat from its stocks, some developed nations may raise objections at the World Trade Organisation.
- Already, in March, India was accused of exporting rice from its stocks.
- India had replied that its rice exports were not from stocks set aside under the public stockholding programs.
India’s consideration
- The Supreme Court in the Right to Food case, observed that the peace clause adopted in WTO’s Bali Ministerial in 2014 does not prevent India from exporting foodgrains.
- With the buffer stocks at hand, India should increase its wheat exports in order to stabilise global prices to the extent that it can.
- It is also important because the countries that were dependent on Russia and Ukraine for their wheat are looking for an alternative source.
Way ahead
- There is a need to prioritise local prices and ensure adequate supplies for domestic consumption before deciding on the quantum of exports.
- Ensuring the stability of prices in India and availability of grain for internal consumption should be of utmost priority to the Indian government
- The government should plan this move in such a way that it does not impact local consumption.
- A bumper crop of wheat is expected, so the government can procure enough for its distribution and buffer needs.
- Further, as of now, there are no export restrictions, so farmers can also get the advantage of higher prices by selling the surplus to private traders for exports.
Try this PYQ from CSP 2019:
Q. Among the agricultural commodities imported by India, which one of the following accounts for the highest imports in terms of value in the last five years?
(a) Spices
(b) Fresh fruits
(c) Pulses
(d) Vegetable oils
Answer is subjective to the year. But still you can give it a try.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Raja Ravi Varma
Mains level: Not Much
Raja Rai Varma’s Draupadi Vastraharan is expected to fetch between Rs 15 and Rs 20 crore at an auction.
Who was Raja Ravi Varma?
- Raja Ravi Varma was born in April 1848 in Kilimanoor, Kerala, to a family which was very close to the royals of Travancore.
- Often referred to as the father of modern Indian art, he is widely known for his realistic portrayal of Indian gods and goddesses.
- While he majorly painted for the royalty, he is also credited for taking art to the masses with his prints and oleographs.
- At a young age, he would draw animals and everyday scenes on the walls in indigenous colours made from natural materials such as leaves, flowers and soil.
- His uncle, Raja Raja Varma, noticed this and encouraged his talent.
- Patronised by Ayilyam Thirunal, the then ruler of Travancore, he learnt watercolour painting from the royal painter Ramaswamy Naidu, and later trained in oil painting from Dutch artist Theodore Jensen.
How he became an artist of the royals?
- Varma became a much sought-after artist for the aristocrats and was commissioned several portraits in late 19th century.
- Arguably, at one point, he became so popular that the Kilimanoor Palace in Kerala opened a post office due to the sheer number of painting requests that would come in for him.
- He travelled across India extensively, for work and inspiration.
Fame as a notable painter
- Following a portrait of Maharaja Sayajirao of Baroda, he was commissioned 14 Puranic paintings for the Durbar Hall of the new Lakshmi Vilas Palace at Baroda.
- Depicting Indian culture, Varma borrowed from episodes of Mahabharata and Ramayana for the same.
- He also received patronage from numerous other rulers, including the Maharaja of Mysore and Maharaja of Udaipur.
- As his popularity soared, the artist won an award for an exhibition of his paintings at Vienna in 1873.
- He was also awarded three gold medals at the World’s Columbian Exposition in Chicago in 1893.
Nature of his artforms
- Much of his celebrated art also borrows heavily from Indian mythology.
- In fact, he is often credited with defining the images of Indian gods and goddesses through his relatable and more realistic portrayals often painted with humans as models.
- The depictions include Lakshmi as the goddess of wealth, Saraswati as the goddess of knowledge and wisdom, and Lord Vishnu with his consorts, Maya and Lakshmi.
How he took Indian art to the masses?
- Raja Ravi Varma aspired to take his art to the masses and the intent led him to open a Lithographic Press in Bombay in 1894.
- The idea, reportedly, came from Sir T Madhava Rao, former Dewan of Travancore and later Baroda, in a letter where he pointed out to Varma that since it was impossible for him to meet the large demand for his work, it would be ideal for him to send some of his select works to Europe and have them produced as oleographs.
- Varma, instead, chose to establish a printing press of his own.
- The first picture printed at Varma’s press was reportedly The Birth of Shakuntala, followed by numerous mythological figures and saints such as Adi Shankaracharya.
Try this PYQ:
Q. There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings?
(a) Bagh caves
(b) Ellora caves
(c) Lomas Rishi cave
(d) Nasik caves
Post your answers here.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Darlong Tribes
Mains level: Scheduled Tribes and issues
The Lok Sabha recently passed a bill to amend a constitutional order to include Darlong, a tribal clan in Tripura which was among the generic Halam community till now, in the list of Scheduled Tribes (ST).
Who are Darlongs?
- Darlong is a tribal community of 11,000 people.
- Despite its small population, the community has a high prevalence of education, cultural activities and members of the community are serving in different high positions in the local administration.
- Darlongs, despite being Scheduled Tribes, were never given ST certificates.
- Since they were considered a generic tribe under the Kuki community, they were handed their tribal certificates as members of ‘Kuki’ community.
- The subsequent identity crisis among them, especially Darlong youths, who were equipped with modern education, culminated in the demand for a separate statutory identity of their own in 1995.
- The group is a small tribal clan but has produced a high number of educated people proportionate to its population in the state.
- People from the Darlong community, like many other tribal communities, are now serving in high positions in the state administration, academia, and public services.
- Tribal musicologist and Rosem (tribal instrument) maestro Thanga Darlong was conferred the prestigious Padma Shri award a few years back for his contribution to culture.
Why is tribal identity a big issue in Tripura?
- Out of 37 lakh people of Tripura, nearly 30 per cent are tribals, who mostly live in areas under jurisdiction of the Tripura Tribal Areas Autonomous District Council (TTAADC).
- They are spread in patches across all eight districts and covering 70 per cent of the state’s geographical area.
- The state saw tribals become minority in their own state due to arrival of East Pakistani refugees who fled their country.
- Tribal identity is a major issue in Tripura, which is also one of the major subjects dominating the state politics now.
- There is rising demand of Greater Tipraland – a proposed separate state for Tiprasa or Tripuris (tribal and non-tribal) living in the state.
Back2Basics: Tribes of Tripura
- Tripura, the tiny Northeast state of 37 lakh people houses 19 tribal communities.
- These include Tripuri or Debbarma, Reangs or Brus, Jamatia, Noatia, Uchoi, Chakma, Mog, Lushai, Kuki, Munda, Kour, Oram, Santhal, Bhil, Bhutia, Chaimar or Sermai, Garo, Khasi, Lepcha and Halam.
- Many of these communities are further divided into sub-tribes.
- For example, Kukis have nearly 17-18 sub-tribes within the community.
- It is an umbrella tribal community including many smaller clans like Khasi, Lushai, Hmars and other generic clans.
- In course of time, Lushai, Hmar, Garo etc. came out of Kuki as separate communities.
- Halam community also has several sub-tribes such as Rangkhawl, Ranglong, Dab, Chaimar or Sermai, Bong, Korbong, Harbong, Bongcher etc.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Hindu new year , Gudi Padwa
Mains level: NA
The President of India has sent his greetings to fellow citizens on the eve of Chaitra Sukladi, Ugadi, Gudi Padwa, Cheti Chand, Navreh and Sajibu Cheiraoba.
Gudi Padwa
- Gudi Padwa is a spring-time festival that marks the traditional New Year for Marathi and Konkani Hindus, but is also celebrated by other Hindus as well.
- It is celebrated in and around Maharashtra, Goa, and the union territory of Damaon on the first day of the Chaitra month, to mark the beginning of the New Year according to the luni-solar method of the Hindu calendar.
- Padava or paadvo comes from the Sanskrit word pratipada, which is the first day of a lunar fortnight.
- The spring festival is observed with colourful floor decorations called rangoli, a special Gudhi dvaja (flag garlanded with flowers, mango and neem leaves, topped with upturned silver or copper vessels), street processions, dancing& festive foods.
Significance
- Gudhi Padva signifies the arrival of spring and to the reaping of Rabi crops.
- The festival is linked to the mythical day on which Hindu god Brahma created time and universe.
- To some, it commemorates the coronation of Rama in Ayodhya after his victory over evil Ravana, or alternatively the start of Shalivahan calendar after he defeated the Huns invasion in the 1st century.
State-wide celebrations
- Bihu among the Assamese of Assam.
- Cheti Chand among the Sindhi people
- Navreh among the Kashmiri Pandits in Jammu and Kashmir.
- Pahela Baishakh among the Bengalis in West Bengal and Bangladesh.
- Puthandu among the Tamils in Tamil Nadu.
- Samvatsar Padvo among Hindu Konkanis of Goa and Konkani diaspora in Kerala
- Vaisakhi or Baisakhi among the Punjabis in Punjab.
- Vishu or among the Malayalis in Kerala.
- Ugadi among the south-Indian states of Karnataka, Andhra Pradesh and Telangana.
- Sajibu Cheiraoba in Manipur
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From UPSC perspective, the following things are important :
Prelims level: Project NETRA
Mains level: Space Debris
The Indian Space Research Organisation (ISRO) is building up its orbital debris tracking capability by deploying new radars and optical telescopes under the Network for Space Objects Tracking and Analysis (NETRA) project.
Project NETRA
- The project will give India its own capability in space situational awareness (SSA) like the other space powers — which is used to ‘predict’ threats from debris to Indian satellites.
- NETRA’s eventual goal is to capture the GEO, or geostationary orbit, scene at 36,000 km where communication satellites operate.
- The initial SSA will first be for low-earth orbits or LEO which have remote-sensing spacecraft.
- Under NETRA the ISRO plans to put up many observational facilities: connected radars, telescopes; data processing units and a control centre.
- They can, among others, spot, track and catalogue objects as small as 10 cm, up to a range of 3,400 km and equal to a space orbit of around 2,000 km.
- The NETRA effort would make India a part of international efforts towards tracking, warning about and mitigating space debris.
What NETRA consists of?
- In the plans are a high-precision, long range telescope in Leh and a radar in the North East.
- Along with them, we will also use the Multi-Object Tracking Radar (MOTR) that we have put up at the Satish Dhawan Space Centre in Sriharikota, and the telescopes at Ponmudi and Mount Abu to get a broad SSA picture.
- NORAD, or the North American Aerospace Defense Command, is an initiative of the U.S. and Canada that shares selective debris data with many countries.
- The new SSA centre would consolidate debris tracking activities that are now spread across ISRO centres.
- Currently there are 15 functional Indian communication satellites in the geostationary orbit of 36,000 km; 13 remote sensing satellites in LEO of up to 2,000 km; and eight navigation satellites in medium earth orbits.
Why Space debris matters?
- Space junk or debris consists of spent rocket stages, dead satellites, fragments of space objects and debris resulting from ASAT.
- Hurtling at an average speed of 27,000 kmph in LEO, these objects pose a very real threat as collisions involving even centimetre-sized fragments can be lethal to satellites.
- Last year, ISRO monitored 4,382 events in LEO and 3,148 events in the geostationary orbit where space objects closely approached Indian assets.
- Fragments from the Fengyun-1C satellite (part of the anti-satellite test (ASAT) by China in 2007) and the Cosmos 2251-Iridium satellite collision in 2009 accounted for the maximum number of these threats.
- The observations also covered 84 “close approaches of less than one km” between Starlink satellites and Indian assets.
Enhancing Space situational awareness (SSA)
- India, as a responsible space power, should have SSA as a part of a national capability, as in the U.S. This is a vital requirement for protecting our space assets and a force multiplier.
- The SSA has a military quotient to it and adds a new ring to the country’s overall security.
- It uses satellites, ground and air radars to secure its two countries against attacks from air, space or sea.
- With long-range tracking radars, the SSA also provides us the capability of an early warning system against ballistic missiles coming in at a height.
- Apart from radars and telescopes, he said India should also think of deploying satellites that track other satellites — as the U.S. and other space powers had done.
- Combined with other elements of military intelligence SSA would help us to understand motives behind any suspicious orbit changes of other satellites and to know if they were spying on or harming our spacecraft.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Startup India Initiative
Mains level: Success of the scheme
A research, reviewing India’s entrepreneurial policy Startup India, affirmed its positive impact in reducing regional entrepreneurial disparities.
Startup India Initiative
- The Startup India campaign was first announced by PM Modi during his speech on 15 August 2015 address from the Red Fort.
- The action plan for this initiative is focusing on three areas:
- Simplification and Handholding.
- Funding Support and Incentives.
- Industry-Academia Partnership and Incubation.
- An additional area relating to this initiative is to discard restrictive States Government policies within this domain, such as License Raj, Land Permissions, Foreign Investment Proposals, and Environmental Clearances.
- It was organized by the Department for promotion of industry and internal trade (DPI&IT).
The success of the scheme
- Minister for Commerce and Industry has informed the Lok Sabha that the entrepreneurial portal had more than 65,000 startups registered.
- Of which, 40 attained the ‘unicorn’ status in the last twelve months, bringing the total as of date to 90.
- India now ranks third among global startup eco-systems.
- The networking, training and mentoring facilities provided by Startup India alongside entrepreneurship outreach campaigns in tier-2 and tier-3 cities, helped address regional entrepreneurial disparities in India.
Limitations to its success
(1) Heavy concentration in megacities
- Entrepreneurship continues to be “highly concentrated” in three megacities, namely, Mumbai, Bengaluru and Delhi NCR.
- India’s venture capital industry is also clustered in and around these three cities.
- Such concentration can lead to increased economic inequality and hinder emergence of entrepreneurs from industries other than those belonging to the clusters.
(2) Narrow Representation
- The Startup India Action Plan document has no mention of the words ‘caste’, ‘tribe’, ‘marginalised’, ‘indigenous’ or ‘social group’.
- Additionally, the policy’s reliance on technology does not take into consideration India’s digital divide, especially with respect to urban and rural areas.
(3) Few Women in the industry
- There is an under-representation of women and marginalized caste groups in the national startup ecosystem.
Dedicated measures to support Women
- 10% of the fund in the Fund of Funds operated by Small Industries Development Bank of India (SIDBI) has been reserved for women-led startups.
- Further, all the alternate investment funds where the SIDBI takes equity have been mandated to contribute 20% in business which are women led.
- There is a capacity-building program and a dedicated webpage for women on the portal.
Way ahead
- There is a need for policies and progressive strategies from governments to encourage startups and provide access and assistance in key areas including tax clarity, incubation, affordability and licensing.
- In any case, governments should be well prepared and dedicated to creating a culture of startups to impact the entrepreneurial ecosystem in their cities, countries and citizens.
Also read:
[Burning Issue] Five Years of Startup India Scheme
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Sariskta TR
Mains level: Forest fires
A massive fire has broken out in the Sariska Tiger Reserve and Air Force helicopters equipped with water sprays are battling to bring it under control.
Sariska Tiger Reserve
- Sariska Tiger Reserve is a tiger reserve in Alwar district, Rajasthan.
- It stretches over an area of 881 sq km comprising scrub-thorn arid forests, dry deciduous forests, grasslands, and rocky hills.
- This area was a hunting preserve of the Alwar state and was declared a wildlife sanctuary in 1958.
- It was given the status of a tiger reserve making it a part of India’s Project Tiger in 1978.
- It is the first reserve in the world with successfully relocated tigers.
- It is a part of the Aravalli Range and the Khathiar-Gir dry deciduous forests eco-region.
Existential threats
- It is rich in mineral resources, such as copper.
- In spite of the Supreme Court’s 1991 ban on mining in the area, marble mining continues to threaten the environment.
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From UPSC perspective, the following things are important :
Prelims level: Microplastics
Mains level: Microplastics Contamination
A study by researchers from The Netherlands has found Microplastics in blood samples. About half of these were PET (polyethylene tertraphthalate) plastics, which is used to make food grade bottles.
What are Microplastics?
- Microplastics are tiny bits of various types of plastic found in the environment.
- The name is used to differentiate them from “macroplastics” such as bottles and bags made of plastic.
- There is no universal agreement on the size of microplastics. It defines microplastic as less than 5mm in length.
- However, for the purposes of this study, since the authors were interested in measuring the quantities of plastic that can cross the membranes and diffuse into the body via the blood stream.
- Hence they agreed on an upper limit on the size of the particles as 0.0007 millimetre.
What were the plastics that the study looked for in the blood samples?
- The study looked at the most commonly used plastic polymers.
- These were polyethylene tetraphthalate (PET), polyethylene (used in making plastic carry bags), polymers of styrene (used in food packaging), poly (methyl methylacrylate) and poly propylene.
- They found a presence of the first four types.
Significance of the study
- Making a human health risk assessment in relation to plastic particles is not easy, perhaps not even possible, due to the lack of data on exposure of people to plastics.
- In this sense, it is important to have studies like this one.
- The authors of the paper also remark that validated methods to detect the tiny (trace) amounts of extremely small-sized (less than 10 micrometre) plastic particles are lacking.
- Hence this study, which builds up a methods to check the same, is important.
Health hazard of microplastics
- It is not yet clear if these microplastics can cross over from the blood stream to deposit in organs and cause diseases.
- The report point out that the human placenta has shown to be permeable to tiny particles of polystyrene ( 50, 80 and 24 nanometre beads).
- Experiments on rats where its lungs were exposed to polystryrene spheres (20 nanometre) led to translocation of the nanoparticles to the placental and foetal tissue.
- Oral administration of microplastics in rats led to accumulation of these in the liver, kidney and gut.
- Further studies have to be carried out to really assess the impact of plastics on humans.
Try this PYQ:
Q. Why is there a great concern about the ‘microbeads’ that are released into environment?
(a) They are considered harmful to marine ecosystems.
(b) They are considered to cause skin cancer in children.
(c) They are small enough to be absorbed by crop plants in irrigated fields.
(d) They are often found to be used as food adulterants.
Post your answers here.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Coral Bleaching
Mains level: Coral Reefs and their significance
The management authority of the world’s largest coral reef system, Australia’s Great Barrier Reef, confirmed on March 25 that the reef is experiencing a mass coral bleaching event.
What are Coral Reefs?
- Corals are marine invertebrates or animals not possessing a spine.
- Each coral is called a polyp and thousands of such polyps live together to form a colony, which grows when polyps multiply to make copies of themselves.
- Australia’s Great Barrier Reef is the world’s largest reef system stretching across 2,300 km.
- It hosts 400 different types of coral, gives shelter to 1,500 species of fish and 4,000 types of mollusc.
- Corals are of two types — hard coral and soft coral:
- Hard corals, also called hermatypic or ‘reef building’ corals extract calcium carbonate (also found in limestone) from the seawater to build hard, white coral exoskeletons.
- Soft coral polyps, however, borrow their appearance from plants, attach themselves to such skeletons and older skeletons built by their ancestors. Soft corals also add their own skeletons to the hard structure over the years and these growing multiplying structures gradually form coral reefs. They are the largest living structures on the planet.
How do the feed themselves?
- Corals share a symbiotic relationship with single-celled algae called zooxanthellae.
- The algae provides the coral with food and nutrients, which they make through photosynthesis, using the sun’s light.
- In turn, the corals give the algae a home and key nutrients.
- The zooxanthellae also give corals their bright colour.
What is Coral Bleaching?
- Bleaching happens when corals experience stress in their environment due to changes in temperature, pollution or high levels of ocean acidity.
- Under stressed conditions, the zooxanthellae or food-producing algae living inside coral polyps start producing reactive oxygen species, which are not beneficial to the corals.
- So, the corals expel the colour-giving zooxanthellae from their polyps, which exposes their pale white exoskeleton, giving the corals a bleached appearance.
- This also ends the symbiotic relationship that helps the corals to survive and grow.
- Severe bleaching and prolonged heat stress in the external environment can lead to coral death.
Impact of climate change
- Over the last couple of decades, climate change and increased global warming owing to rising carbon emissions and other greenhouse gases have made seas warmer than usual.
- Under all positive outlooks and projections in terms of cutting greenhouse gases, sea temperatures are predicted to increase by 1.5°C to 2°C by the time the century nears its end.
- The first mass bleaching event had occurred in 1998 when the El Niño weather pattern caused sea surfaces in the pacific ocean to heat up; this event caused 8% of the world’s coral to die.
- The second event took place in 2002.
- In the past decade, however, mass bleaching occurrences have become more closely spaced in time, with the longest and most damaging bleaching event taking place from 2014 to 2017.
Significance of Corals
- Coral reefs support over 25% of marine biodiversity, including fish, turtles and lobsters; even as they only take up 1% of the seafloor.
- The marine life supported by reefs further fuels global fishing industries. Even giant clams and whales depend on the reefs to live.
- Besides, coral reef systems generate $2.7 trillion in annual economic value through goods and service trade and tourism.
- In Australia, the Barrier Reef, in pre-COVID times, generated $4.6 billion annually through tourism and employed over 60,000 people including divers and guides.
- Aside from adding economic value and being a support system for aquatic life, coral reefs also provide protection from storm waves.
- Dead reefs can revive over time if there are enough fish species that can graze off the weeds that settle on dead corals, but it takes almost a decade for the reef to start setting up again.
Current condition of the Great Barrier Reef
- The United Nations Intergovernmental Panel on Climate Change (IPCC) released its report this month, which warned that the life of the Great Barrier is in grave danger.
- The report said that if temperatures continue to rise, bleaching events may occur more often and a large proportion of the remaining reef cover in Australia could be lost.
- Just a couple of weeks after this warning, the Barrier Reef Authority confirmed a mass bleaching phenomenon affecting all pockets of the reef system.
Try this PYQ:
Q. Consider the following statements:
- Most of the world’s coral reefs are in tropical waters.
- More than one third of the world’s coral reefs are located in the territories of Australia, Indonesia and Philippines.
- Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.
Which of the above statements is/are correct?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1 and 3 only
Post your answers here.
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From UPSC perspective, the following things are important :
Prelims level: Articulated All-Terrain Vehicles
Mains level: Not Much
The Indian Army has issued a Request For Information (RFI) for the supply of Articulated All-Terrain Vehicles to be deployed in Ladakh and Kutch.
What are Articulated All-Terrain Vehicles?
- Articulated ATV is a twin cabin, tracked, amphibious carrier for off road mobility.
- The special design of this equipment exerts low ground pressure on the soil and a pull-push mode of locomotion between two cabins facilitates mobility over varied terrains like snow, desert and slush.
- A ballistic protection in the cabin body ensures protection to troops travelling in it from small arms fire.
- They can reach where wheeled vehicles cannot due to deep snow, slush or marshy terrain and can be very effective for patrolling and rapid deployment in operational situations.
Utility of these vehicles
- These vehicles are very useful to move troops or supplies in snow-bound terrains and in marshy/sandy environments.
- The Indian Army wishes to use these vehicles in the snow-bound areas of Ladakh and in the marshy terrain of the Rann of Kutch.
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From UPSC perspective, the following things are important :
Prelims level: Malabar Rebellion
Mains level: Not Much
The Indian Council for Historical Research (ICHR) has deferred its decision on a recommendation to remove the 1921 Malabar Rebellion martyrs, including Variamkunnaathu Kunhahamad Haji and Ali Musliyar, from the list of India’s freedom fighters.
Malabar Rebellion
- The Malabar Rebellion in 1921 started as resistance against the British colonial rule and the feudal system in southern Malabar but ended in communal violence between Hindus and Muslims.
- There were a series of clashes between Mappila peasantry and their landlords, supported by the British, throughout the 19th and early 20th centuries.
- It began as a reaction against a heavy-handed crackdown on the Khilafat Movement, a campaign in defence of the Ottoman Caliphate by the British authorities in the Eranad and Valluvanad taluks of Malabar.
- The Mappilas attacked and took control of police stations, British government offices, courts and government treasuries.
Who was Variyankunna Kunjahammed Haji?
- He was one of the leaders of the Malabar Rebellion of 1921.
- He raised 75000 natives, seized control of large territory from the British rule and set up a parallel government.
- In January 1922, under the guise of a treaty, the British betrayed Haji through his close friend Unyan Musaliyar, arresting him from his hideout and producing him before a British judge.
- He was sentenced to death along with his compatriots.
Back2Basics: “Dictionary of Martyrs” Project
- The project for compilation of “Dictionary of Martyrs” of India’s Freedom Struggle was commissioned by the Ministry of Culture, to the Indian Council of Historical Research (ICHR) to commemorate the 150th anniversary of uprising of 1857.
- In this dictionary a martyr has been defined as a person who died or who was killed in action or in detention, or was awarded capital punishment while participating in the national movement for emancipation of India.
- It includes ex-INA or ex-military personnel who died fighting the British.
- Information of about 13,500 martyrs has been recorded in these volumes.
Who are included?
- It includes the martyrs of 1857 Uprising, Jallianwala Bagh Massacre (1919), Non-Cooperation Movement (1920-22), Civil Disobedience Movement (1930-34), Quit India Movement (1942-44), Revolutionary Movements (1915-34), Kissan Movements, Tribal Movements, Agitation for Responsible Government in the Princely States (Prajamandal), Indian National Army (INA, 1943-45), Royal Indian Navy Upsurge (RIN, 1946), etc.
Five Volumes
- Volume 1: In this volume, more than 4400 martyrs of Delhi, Haryana, Punjab and Himachal Pradesh have been listed.
- Volume 2: In this volume more than 3500 martyrs of Uttar Pradesh, Uttarakhand, Madhya Pradesh, Chhattisgarh, Rajasthan and Jammu & Kashmir have been listed.
- Volume 3: The number of martyrs covered in this volume is more than 1400. This volume covers the martyrs of Maharashtra, Gujarat and Sind.
- Volume 4: The numbers of martyrs covered in this volume is more than 3300. This volume covers the martyrs of Bengal, Bihar, Jharkhand, Odisha, Assam, Arunachal Pradesh, Manipur, Meghalaya, Nagaland and Tripura.
- Volume 5: The number of martyrs covered in this volume is more than 1450. This volume covers the martyrs of Andhra Pradesh, Telangana, Karnataka, Tamil Nadu and Kerala.
Try this question from CSP 2020:
Q. With reference to the history of India, “Ulgulan” or the Great Tumult is the description of which of the following event?
(a) The Revolt of 1857
(b) The Mappila Rebellion of 1921
(c) The Indigo Revolt of 1859-60
(d) Birsa Munda’s Revolt of 1899-1900
Post your answers here.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: CSWS
Mains level: Not Much
A corner-shot weapon system (CSWS), designed and developed by the Defence Research and Development Organisation (DRDO), is at an advanced stage of being inducted by the Central Reserve Police Force (CRPF) and the Jammu and Kashmir police.
What is CSWS?
- The CSWS is a special purpose weapon designed by the Armament Research and Development Establishment (ARDE), Pune.
- It can engage targets located around the corners as the system bends and captures video feed thus saving soldiers from any surprise counter-attack and is best suited for urban, close quarter situations.
- It is equipped with weapon, camera, laser, infrared illuminator and torch in front portion, while display, electronics, battery and swivelling mechanism are located at rear portion.
- The body is made from high-grade aluminium alloy to make it lighter and durable.
Key features
- Day-night firing capability, colour display, digital zoom, zeroing facility, hot keys, high power battery along with status display and compliance with JSS 5855 makes it a very potent system for security forces.
- It is very helpful in Counter Insurgency and Counter Terror (CI/CT) operations.
- This indigenously developed system has many superior features compared to its contemporary international systems and available for 9 mm GLOCK 17/19 and 1A1 Auto Pistol variant.
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From UPSC perspective, the following things are important :
Prelims level: T-Cell Immunity
Mains level: Long term health impact of COVID
A new study from Wuhan has studied the role of T-Cell Immunity against prolonged and sever COVID-19.
What are T-Cells?
- Like B cells, which produce antibodies, T cells are central players in the immune response to viral infection.
- For your immune system to fight off any kind of invader, such as a virus, you need a kind of white blood cell called a B cell, which makes antibodies, and a similar-looking white blood cell called a T cell.
- T cells can play different roles altogether.
- They can act as “killer cells”, attacking cells which have been infected with a virus or another kind of pathogen, or they can act as “helper cells” by supporting B cells to produce antibodies.
How do they function?
- Alongside antibodies, the immune system produces a battalion of T cells that can target viruses.
- Some of these, known as killer T cells (or CD8+ T cells), seek out and destroy cells that are infected with the virus.
- Others, called helper T cells (or CD4+ T cells) are important for various immune functions, including stimulating the production of antibodies and killer T cells.
- T cells do not prevent infection, because they kick into action only after a virus has infiltrated the body. But they are important for clearing an infection that has already started.
- In the case of COVID-19, killer T cells could mean the difference between a mild infection and a severe one that requires hospital treatment.
What did the latest research find?
- The researchers found that neutralising antibodies were detectable even 12 months after infection in “most individuals”.
- It remained stable 6-12 months after initial infection in people younger than 60 years.
- The researchers found that “multifunctional T cell responses were detected for all SARS-CoV-2 viral proteins tested”.
- And most importantly, the magnitude of T cell responses did not show any difference immaterial of how severe the disease was.
- While the ability of antibodies to neutralise was nearly absent against the Beta variant, it was reduced in the case of the Delta variant.
Neutralizing antibodies
- SARS-CoV-2-specific neutralising antibody and T cell responses were retained 12 months after initial infection.
- Neutralising antibodies to the D614G, Beta, and Delta were reduced compared with those for the original strain, and were diminished in general.
- Memory T cell responses to the original strain were not disrupted by new variants.
- The findings show that robust antibody and T cell immunity against SARS-CoV-2 is present in majority of recovered patients 12 months after moderate-to-critical infection.
Robustness of antibodies
- The study reveals the durability and robustness of the T cell responses against variants, including Delta, even after one year of infection.
- Most importantly, the robust and longstanding T cell responses were seen in people who have not been reinfected or vaccinated.
- This would mean even in the absence of vaccination, a person who has been infected by the virus even one year ago would have robust immune responses.
- It would offer protection against disease progressing to a severe form requiring hospitalization.
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From UPSC perspective, the following things are important :
Prelims level: Indias military satellites
Mains level: Not Much
The Defence Acquisition Council (DAC) chaired by Defence Minister Rajnath Singh cleared the Acceptance of Necessity (AoN) for procurement of a GSAT 7B satellite.
What are the GSAT 7 series satellites?
- GSAT 7 satellites are advanced satellites developed by the ISRO to meet the communication needs of the defence services.
- The satellite was injected into a geosynchronous transfer orbit (GTO) of 249 km perigee (nearest point to earth), 35,929 km apogee (farthest point to earth) and an inclination of 3.5 degree with respect to the equator.
- The GSAT 7 satellite was launched in August 2013 from an Ariane 5 ECA rocket from Kourou in French Guiana.
- It is a 2,650 kg satellite which has a footprint of nearly 2,000 nautical miles in the Indian Ocean region.
Utility of this satellite
- This satellite is mainly used by the Indian Navy for its communication needs.
- The GSAT 7 provides a gamut of services for military communication needs, which includes low bit voice rate to high bit rate data facilities, including multi-band communications.
- Named Rukmini, the satellite carries payloads in UHF, C-band and Ku-band, and helps the Navy to have a secure, real time communication link between its land establishments, surface ships, submarines and aircraft.
What will be the role of the GSAT 7B satellite?
- The GSAT 7B will primarily fulfil the communication needs of the Army.
- Currently, the Army is using 30 per cent of the communication capabilities of the GSAT 7A satellite, which has been designed for the Indian Air Force (IAF).
- The GSAT 7B will also help the Army enhance its surveillance in border areas.
- While many features of this satellite are still a closely guarded secret, it is expected that the state of the art, multi-band, military-grade satellite shall be a shot in the arm for the communication and surveillance needs of the Army.
What is the role of the GSAT 7A satellite, which is already operational?
- The GSAT 7A was launched in 2018 from the Satish Dhawan Space Centre in Sriharikota.
- It has gone a long way in boosting the connectivity between the ground radar stations, airbases and the airborne early warning and control aircraft (AEW&C) of the IAF.
- It also helps in satellite controlled operations of unmanned aerial vehicles (UAVs) which gives a great deal of reliability to the operations as compared to ground-controlled operations.
- This satellite has 10 channels in Ku band with switchable frequency for mobile users, one fixed Gregorian or parabolic antenna, and four steerable antennae.
Future plans
- A GSAT 7C satellite is on the cards for the IAF, and a proposal to this effect was cleared by the DAC in 2021.
- This satellite would facilitate real time communication with IAF’s software defined radio communication sets.
- It will increase the capability of the IAF to communicate beyond the line of sight in a secure mode.
What other kinds of military satellites does India have?
- An Electromagnetic Intelligence Gathering Satellite (EMISAT), developed by ISRO, was launched in April 2020 through a Polar Satellite Launch Vehicle (PSLV-C45).
- It has an Electronic Intelligence (ELINT) package called Kautilya, which allows the interception of ground-based radar and also carries out electronic surveillance across India.
- The ELINT package provides the capability in direction-finding of radar and fixing their locations.
- It is placed in a 748-km orbit, and is said to be based on the Israeli satellite system.
- This satellite circles the globe pole-to-pole, and is helpful in gathering information from radars of countries that have borders with India.
- India also has a RISAT 2BR1 synthetic aperture radar imaging satellite, which was launched in December 2019 from Sriharikota.
- It has the capability to operate in different modes including very high resolution imaging modes of 1×0.5 metre resolution and 0.5×0.3 m resolution with a swath of 5-10 km.
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From UPSC perspective, the following things are important :
Prelims level: Artemis Mission
Mains level: Not Much
On March 17, the National Aeronautics and Space Administration (NASA) rolled out its Artemis I moon mission to the launchpad for testing at the Kennedy Space Centre in Florida, United States.
What is the Artemis I Mission?
- NASA’s Artemis mission is touted as the next generation of lunar exploration, and is named after the twin sister of Apollo from Greek mythology.
- Artemis is also the goddess of the moon.
- Artemis I is the first of NASA’s deep space exploration systems.
- It is an uncrewed space mission where the spacecraft will launch on SLS — the most powerful rocket in the world — and travel 2,80,000 miles from the earth for over four to six weeks during the course of the mission.
- The Orion spacecraft is going to remain in space without docking to a space station, longer than any ship for astronauts has ever done before.
- The SLS rocket has been designed for space missions beyond the low-earth orbit and can carry crew or cargo to the moon and beyond.
Key objectives of the mission
- With the Artemis Mission, NASA aims to land humans on the moon by 2024, and it also plans to land the first woman and first person of colour on the moon.
- With this mission, NASA aims to contribute to scientific discovery and economic benefits and inspire a new generation of explorers.
- NASA will establish an Artemis Base Camp on the surface and a gateway in the lunar orbit to aid exploration by robots and astronauts.
- The gateway is a critical component of NASA’s sustainable lunar operations and will serve as a multi-purpose outpost orbiting the moon.
Other agencies involved
- Other space agencies are also involved in the Artemis programme.
- The Canadian Space Agency has committed to providing advanced robotics for the gateway.
- The European Space Agency will provide the International Habitat and the ESPRIT module, which will deliver additional communications capabilities among other things.
- The Japan Aerospace Exploration Agency plans to contribute habitation components and logistics resupply.
What is the mission trajectory?
- SLS and Orion under Artemis I will be launched from the Kennedy Space Centre in Florida, U.S. in the summer of 2022.
- The spacecraft will deploy the interim cryogenic propulsion stage (ICPS), a liquid oxygen/liquid hydrogen-based propulsion system that will give Orion the thrust needed to leave the earth’s orbit and travel towards the moon.
- On its way to the moon, Orion will be propelled by a service module provided by the European Space Agency (ESA).
- The spacecraft will communicate with the control centre back on Earth through the deep-space network.
- It will fly around 100 km above the surface of the moon and use its gravitational pull to propel Orion into an opposite deep orbit around 70,000 km from the moon, where it will stay for approximately six days.
What are the future missions in the Artemis programme?
- The second flight under the programme will have crew on board and will test Orion’s critical systems with humans onboard.
- Eventually, the learnings from the Artemis programme will be utilised to send the first astronauts to Mars.
- NASA plans on using the lunar orbit to gain the necessary experience to extend human exploration of space farther into the solar system.
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From UPSC perspective, the following things are important :
Prelims level: Abel Prize
Mains level: Not Much
The Norwegian Academy of Science and Letters has awarded the Abel prize for the year 2022 to American Mathematician Dennis Parnell Sullivan, for his contributions to topology in its broadest sense, and in particular its algebraic, geometric and dynamical aspects.
Abel Prize
- The Abel Prize is a prize awarded annually by the King of Norway to one or more outstanding mathematicians.
- It is named after Norwegian mathematician Niels Henrik Abel (1802–1829) and directly modeled after the Nobel Prizes.
- It comes with a monetary award of 7.5 million Norwegian kroner (NOK) (increased from 6 million NOK in 2019).
- Its establishment was proposed by the Norwegian mathematician Sophus Lie when he learned that Alfred Nobel’s plans for annual prizes would not include a prize in mathematics.
- The laureates are selected by the Abel Committee, the members of which are appointed by the Norwegian Academy of Science and Letters.
Has any Indian won this prestigious prize?
- R. Srinivasa Varadhan, an Indian-American citizen won the Abel Prize in the year 2007 for his valuable contribution in “probability theory and in particular for creating a unified theory of large deviation”.
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From UPSC perspective, the following things are important :
Prelims level: Exercise LAMITIYE
Mains level: Not Much
The 9th Joint Military Exercise LAMITIYE-2022 between the Indian Army and Seychelles Defence Forces (SDF) is being conducted at Seychelles Defence Academy (SDA), Seychelles.
Exercise LAMITIYE
- Lamitiye, which in Creole means friendship, is a biennial training event being conducted in Seychelles since 2001.
- This year, it will feature a range of complex military drills, demonstrations and discussions, officials said.
- The objective of the joint training exercise is to build and promote bilateral military relations in addition to exchanging skills, experiences and good practices between both the armies.
- Both sides will jointly train, plan and execute a series of well-developed tactical drills for neutralization of likely threats that may be encountered in a semi-urban environment.
- The exercise will also witness showcasing of new-generation equipment and technology for conducting joint operations.
Significance of the exercise
- LAMITIYE is crucial and significant in terms of security challenges faced by both nations in the backdrop of the current global situation and growing security concerns in the Indian Ocean region.
Tap to read more about:
Various Defence Exercises in News
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From UPSC perspective, the following things are important :
Prelims level: Par Tapi Narmada river-linking project
Mains level: Not Much
The tribals in Gujarat held a public meeting in Kaprada in Valsad district to protest against the Centre’s Par Tapi Narmada (PTN) river-linking project.
Par Tapi Narmada river-linking project
- The PTN link project was envisioned under the 1980 National Perspective Plan under the former Union Ministry of Irrigation and the Central Water Commission (CWC).
- The project proposes to transfer river water from the surplus regions of the Western Ghats to the deficit regions of Saurashtra and Kutch.
- It proposes to link three rivers — Par, originating from Nashik in Maharashtra and flowing through Valsad, Tapi from Saputara that flows through Maharashtra and Surat in Gujarat, and Narmada originating in Madhya Pradesh and flowing through Maharashtra and Bharuch and Narmada districts in Gujarat.
Components of the project
- The link mainly includes the construction of seven dams (Jheri, Mohankavchali, Paikhed, Chasmandva, Chikkar, Dabdar and Kelwan), three diversion weirs and two tunnels.
- Of these, the Jheri dam falls in Nashik, while the remaining dams are in Valsad and Dang districts of South Gujarat.
Centre’s role
- A Memorandum of Understanding (MoU) was signed between Gujarat, Maharashtra and the central government on May 3, 2010.
- It envisaged that Gujarat would get the benefit of the Par Tapi Narmada link project through en-route irrigation from the link canal and in the drought-prone Saurashtra Kutch region by way of substitution.
Issues with the Project
- About 6065 hectares of land area will be submerged due to the proposed reservoirs.
- A total of 61 villages will be affected, of which one will be fully submerged and the remaining 60 partly.
- The total number of affected families would be 2,509 of which 98 families would be affected due to the creation of the Jheri reservoir, the only one in Maharashtra, spread over six villages.
- The affected families may lose their lands or houses or both in the submergence when the reservoirs are created.
- The districts where the project will be implemented are largely dominated, by tribals who fear displacement.
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From UPSC perspective, the following things are important :
Prelims level: Kinzhal Missile
Mains level: Not Much
Russia said that it had unleashed hypersonic missiles against an arms depot in Ukraine, the first use of the next-generation weapons in combat.
Kinzhal Missile
- It is a nuclear-capable air-launched ballistic missile that flies at 10 times the speed of sound and can overcome air-defence systems. Kinzhal means ‘dagger’.
- The missile has a range of approximately 1,500-2,000km and can carry a nuclear payload or conventional payload of 480 kg.
- The Kinzhal was one of an array of new weapons Russian President Vladimir Putin unveiled in his state-of-the-nation address in 2018. Putin had termed Kinzhal as “an ideal weapon”.
- This is the first time that Russia has admitted to using the high-precision weapon in combat.
- Following launch, the Kinzhal rapidly accelerates to Mach 4 (4,900 km/h), and may reach speeds of up to Mach 10 (12,350 km/hr).
What is a hypersonic weapon?
- They are normally defined as fast, low-flying, and highly manoeuvrable weapons designed to be too quick and agile for traditional missile defence systems to detect in time, according to Bloomberg.
- Unlike ballistic missiles, hypersonic weapons don’t follow a predetermined, arched trajectory and can maneuver on the way to their destination.
- The term “hypersonic” describes any speed faster than five times that of sound, which is roughly 760 miles (1,220 kilometers) per hour at sea level.
- At hypersonic speeds, the air molecules around the flight vehicle start to change, breaking apart or gaining a charge in a process called ionization.
- This subjects the hypersonic vehicle to “tremendous” stresses as it pushes through the atmosphere.
Types of hypersonic weapons
- There are two main types of these weapons — glide vehicles and cruise missiles.
- Most of the attention is focused on the former, which are launched from a rocket before gliding to their target, because of the challenges of achieving hypersonic propulsion of missiles.
- The missiles have engines called scramjets that use the air’s oxygen and produce thrust during their flight, allowing them to cruise at a steady speed and altitude.
Who has these weapons?
- US, China and Russia have the most advanced capabilities.
- Several other countries are investigating the technology, including India, Japan, Australia, France, Germany and North Korea, which claims to have tested a hypersonic missile.
- In fact, India is also closing in on having such weapons in its arsenal.
- Last year, India successfully tested its hypersonic technology demonstrator vehicle (HSTDV), powered by a scramjet engine.
- The HSTDV will serve as a crucial building block in the development of long-range hypersonic weapons, which will take at least another four to five years to become a reality.
Back2Basics: Types of Missiles
(1) Subsonic missiles
- They travel at a rate slower than the speed of sound.
- Most well-known missiles, such as the US Tomahawk cruise missile, the French Exocet, and the Indian Nirbhay, fall into this category.
- These travel at about Mach-0.9 (705 mph), and are slower and easier to intercept, but they continue to play a significant role in modern battlefields.
- They significantly less expensive to produce because the technological challenges have already been overcome and mastered.
- Due to their low speed and small size, subsonic missiles provide an additional layer of strategic value.
(2) Supersonic missiles
- They are the one that travels faster than the speed of sound (Mach 1) but not faster than Mach-3.
- Most supersonic missiles travel at speeds ranging from Mach-2 to Mach-3, or up to 2,300 mph.
- The Indian/Russian BrahMos, currently the fastest operational supersonic missile capable of speeds of around 2,100–2,300 mph, is the most well-known supersonic missile.
(3) Hypersonic Missiles
Explained above
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