💥Join UPSC 2027,2028 Mentorship (August Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

GS Paper: GS3-16.Achievements of Indians in Science & Technology

  • Frequency Comb

     Why in the News?

    • Frequency combs are highlighted as key modern tools used in atomic clock calibration and other precision measurements.

    What is a Frequency Comb

    • A special type of laser light
    • Its spectrum looks like the teeth of a comb
    • Connects the radio frequency domain (below ~100 GHz) with the optical domain (above ~200 THz)
    • Acts as a precise bridge between microwave and optical frequencies

    Key Characteristics

    • Emits many evenly spaced frequencies, not a single colour
    • Frequency spacing is extremely regular
    • Exhibits very high stability and precision
    • Enables coherent phase connection across wide frequency ranges
    • Compact and highly reliable measurement tool

    Why It Is Important

    • Allows comparison of an unknown light frequency with a stable reference
    • Achieves extraordinary measurement accuracy
    • Revolutionised precision metrology and optical physics

    Applications of Frequency Combs

    • Calibration of atomic clocks
    • Measurement of gravitational redshift effects on light
    • Detection of exoplanets using precise stellar spectroscopy
    • High speed and ultra precise spectroscopy
    • Fundamental physics experiments and precision navigation

    Prelims Takeaway

    • Frequency comb equals laser with evenly spaced frequencies
    • Acts as a frequency ruler for light
    • Essential for atomic clocks, astrophysics, spectroscopy, and precision measurements
    The term ‘Goldilocks Zone’ is often seen in the news in the context of (2015)

    (a) the limits of habitable zone above the surface of the Earth 

    (b) regions inside the Earth where shale gas is available 

    (c) search for the Earth-like planets in outer space 

    (d) search for meteorites containing precious metals

  • K 4 Missile  

    Why in the News?

    India successfully tested the K 4 submarine launched ballistic missile from INS Arighaat in the Bay of Bengal, strengthening its sea based nuclear deterrence.

    About K 4 Missile

    • Also known as Kalam 4 (K 4)
      • Nuclear capable intermediate range submarine launched ballistic missile (SLBM)
      • Designed mainly for deployment on Arihant class submarine
      • Indigenously developed by Defence Research and Development Organisation
    • Each Arihant class submarine can carry four K 4 missiles

    Key Features

    • Length about 12 metres
      • Weight around 17 tonnes
      • Two stage solid fuel propulsion system
      • Maximum range around 3,500 km
      • Payload capacity up to 2 tonnes, including nuclear warhead

    Prelims Pointers

    • K 4 is an SLBM, not a cruise missile
       • Operates from nuclear powered submarines
       • Uses NavIC for navigation support
       • Part of India’s indigenous strategic weapons programme
    Consider the following statements: (2023)

    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight. 

    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile. 

    Which of the statements given above is/are correct? 

    (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

  • NASA Loses Contact with MAVEN  

    Why in the News?

    The National Aeronautics and Space Administration has lost contact with its Mars orbiter Mars Atmosphere and Volatile Evolution (MAVEN), which has been studying the Red Planet’s atmosphere for over a decade.

    About MAVEN Mission

    • Launch: by NASA
    • Launch site: Cape Canaveral, Florida
    • Mars orbit insertion: September 2014
    • Mission type: Mars orbiter
    • Primary objective: Study the loss of Mars atmosphere to space

    Scientific Objectives

    • Measure the thin upper atmosphere of Mars
    • Study the ionosphere, which consists of charged particles
    • Observe interaction of sunlight and solar wind with the Martian atmosphere
    • Explain how Mars changed from a warm and wet planet to a cold and dry one
    [2016] Consider the following statements: The Mangalyaan launched by ISRO: 

    1. is also called the Mars Orbiter Mission. 

    2. made India the second country to have a spacecraft orbit the Mars after USA. 

    3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt. 

    Which of the statements given above is/are correct? 

    (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

  • Anjadip Inducted into Indian Navy  

    Why in the News?

    The Indian Navy received Anjadip, the third of eight Anti Submarine Warfare Shallow Water Craft (ASW SWC), on December 22, 2025 at Chennai.

    About Anjadip and ASW SWC Project

    • Type: Anti Submarine Warfare Shallow Water Craft
    • Role: Anti submarine warfare, coastal surveillance, mine laying
    • Length: Around 77 metres
    • Propulsion: Waterjets
    • Distinction: Largest Indian naval warships propelled by waterjets

    Builder and Collaboration

    • Designed and built by Garden Reach Shipbuilders and Engineers
    • Project executed under Public Private Partnership
    • Private partner: Larsen and Toubro Shipyard, Kattupalli
    • Classification: Built as per Indian Register of Shipping rules
    [2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently? 

    (a) Amphibious warfare ship 

    (b) Nuclear-powered submarine 

    (c) Torpedo launch and recovery vessel 

    (d) Nuclear-powered aircraft carrier 

  • Dark Eagle Hypersonic Missile System

    Why in the News?

    The United States Army and United States Navy have successfully completed integrated testing of the Dark Eagle Long Range Hypersonic Weapon (LRHW) system.

    About Dark Eagle Hypersonic Missile System

    • Hypersonic missile system developed for the United States Army
      • Non nuclear, ground-launched weapon system
      • Designed for strategic attack missions
      • Developed by Lockheed Martin and Northrop Grumman
      • Intended to penetrate Anti Access Area Denial (A2 AD) environments

    Strategic Role

    • Suppresses long range enemy fires
      • Penetrates advanced missile defense systems
      • Delivers rapid, precise, and time critical strikes
      • Enhances conventional deterrence without nuclear escalation

    Prelims Pointers

    • Country: United States
      • Type: Ground launched hypersonic weapon
      • Nuclear status: Non nuclear
      • Speed: Up to Mach 17
      • Key component: Common Hypersonic Glide Body
      • Objective: Penetration of A2 AD defenses
    [2022] Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in media?

     (a) A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space. 

    (b) A spacecraft lands on another planet after making several orbital motions. 

    (c) A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth. 

    (d) A spacecraft moves along a comet with the same speed and places a probe on its surface.

  • Annatto

    Why in the news?

    • As informed by the Council of Scientific and Industrial Research (CSIR), the CSIR–Central Food Technological Research Institute (CFTRI), Mysuru has undertaken four Grant-in-Aid projects related to the study and development of annatto.

    What is Annatto?

    • Annatto is a natural food colouring and flavouring agent.
    • Obtained from the seeds of the achiote tree (Bixa orellana).

    Origin & Botanical Facts

    • Scientific name: Bixa orellana
    • Native region: Tropical regions of the Americas
    • Plant type: Shrub/small tree
    • Usable part: Seed coating

    Key Chemical Constituents

    • Contains carotenoids (plant pigments)
      • Responsible for yellow-orange colour
    • Rich in:
      • Antioxidants
      • Tocotrienols (a form of Vitamin E)
      • Antimicrobial compounds

    Uses of Annatto

    Food Industry

    • Accounts for ~70% of natural food colours used globally
    With reference to ‘palm oil,’ consider the following statements: (2021)

    1. The palm oil tree is native to Southeast Asia. 

    2. Palm oil is a raw material for some industries producing lipstick and perfumes. 

    3. Palm oil can be used to produce biodiesel. 

    Which of the statements given above are correct? 

    (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2, and 3

  • Ekam AI and Project SAMBHAV

    Why in the News?

    During Vijay Diwas celebrations, the Indian Army showcased indigenous defence technologies including Ekam AI and Project SAMBHAV, highlighting progress in defence indigenisation and secure digital capabilities.

    About Ekam AI

    • Fully indigenous and secure Artificial Intelligence platform
     • Designed for sensitive and classified environments
     • No dependence on foreign software or external cloud systems

    Key Features of Ekam AI

    • Data analysis, document management and decision support
     • User friendly AI accessible across all personnel levels
     • No requirement of specialised technical expertise
     • Ensures data security and digital sovereignty

    Significance of Ekam AI

    • Strengthens national data sovereignty
     • Reduces strategic dependence on foreign AI platforms
     • Builds trusted national digital infrastructure

    About Project SAMBHAV

    • Portable satellite based communication system
     • Developed by the Indian Army
     • Provides mobile connectivity in remote, border and disaster affected areas

    Key Features of Project SAMBHAV

    • Rapid deployment capability
     • Functions in network denied areas
     • Supports military operations and civilian disaster response

    Significance of Project SAMBHAV

    • Enhances communication resilience
     • Strengthens national disaster management infrastructure
     • Demonstrates dual use defence technology

    What is Vijay Diwas

    • Observed annually on 16 December
     • Commemorates India’s victory in the 1971 India Pakistan War
     • Led to the liberation of Bangladesh

    Consider the following statements: (2023)

    1. Ballistic missiles are jet-propelled at sub-sonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight. 

    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fu-elled intercontinental ballistic missile. 

    Which of the statements given above is/ are correct? 

    (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

  • BlueBird 6 Satellite and LVM 3

    Why in the News?

    The Indian Space Research Organisation ISRO is scheduled to launch the BlueBird 6 satellite, developed by US based AST SpaceMobile, on 21 December 2025 using India’s heavy lift rocket LVM 3.

    About BlueBird 6 Satellite

    • Developer: AST SpaceMobile USA
     • Purpose: Provides direct to device internet connectivity, enabling normal mobile phones to access broadband without dependence on ground based cell towers
     • Weight: Around 6.5 tonnes, making it among the heaviest commercial satellites launched by ISRO
     • Orbit: Low Earth Orbit LEO
     • Technology: Equipped with one of the largest phased array antennas ever deployed in space, covering nearly 2,400 square feet
     • Capable of direct communication with standard smartphones
     • Significance: Enhances global mobile broadband connectivity, particularly in remote and rural regions
     • Strategic importance: Strengthens Indo US space cooperation and expands commercial space launch collaboration
     • Future impact: Helps bridge the digital divide by providing internet access in regions without cellular infrastructure

    About LVM 3

    • Full name: Launch Vehicle Mark 3
     • Also called GSLV Mk III or Bahubali
     • India’s heavy lift launch vehicle developed by ISRO
     • Designed for large satellite launches and human spaceflight missions

    With reference to India’s satellite launch vehicles, Consider the following statements: (2018)

    1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites. 

    2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth. 

    3. GSLV Mk III is a four-stage launch vehicle with the first and third stages using solid rocket motors, and the second and fourth stages using liquid rocket engines. 

    Which of the statements given above is/ are correct? 

    (a) 1 only (b) 2 and 3 (c) 1 and 2 (d) 3 only

  • Diving Support Craft A20

    Why in the news?

    The Indian Navy is set to commission Diving Support Craft (DSC) A20 at Kochi under the Southern Naval Command, marking a key milestone in indigenous naval capability.

    About Diving Support Craft A20

    • First vessel of the indigenously designed and constructed Diving Support Craft class
     • Lead ship in a series of five DSCs
     • Built by M s Titagarh Rail Systems Limited, Kolkata
     • Designed for a wide range of diving and underwater missions in coastal waters

    Prelims Pointers

    • DSC A20 is an indigenously built naval auxiliary vessel
    • Builder: Titagarh Rail Systems Limited
    • Hull type: Catamaran
    • Command: Southern Naval Command
    • Focus areas include diving operations, underwater missions, and salvage support
    Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently? (2016)

    (a) Amphibious warfare ship 

    (b) Nuclear-powered submarine 

    (c) Torpedo launch and recovery vessel 

    (d) Nuclear-powered aircraft carrier

  • NSIL and ISRO Technology Transfer 

    Why in the News?

    NewSpace India Limited (NSIL) has so far signed 70 Technology Transfer Agreements (TTAs) to license technologies developed by ISRO to Indian industries.

    About NSIL

    • Commercial arm of the Department of Space (DoS), incorporated under the Companies Act 2013.
    • Mandated to:
      • Commercialise ISRO technologies.
      • Enable industry participation in space missions.
      • Act as the actual licensor of ISRO technologies.

    Technology Transfer Mechanism

    Types of Agreements

    1. Technology Transfer Agreements (TTAs) – Define rights, obligations, and usage of transferred technology.
    2. Non-Disclosure Agreements (NDAs) – Contain explicit confidentiality clauses protecting commercially sensitive information.

    Role of IN-SPACe

    • Acts as a facilitator for Non-Governmental Entities (NGEs).
    • NSIL remains the licensing authority.

    Oversight for Fairness

    • A dedicated Technology Transfer Committee reviews all proposals.
    • Ensures transfers are transparent, equitable, and accountable.

    Transparency and RTI Compliance

    • NSIL is a public authority under RTI Act, 2005.
    • Suo motu disclosure under Section 4:
      • Lists technologies available for transfer.
      • Guidelines and procedures for NGEs.
      • Periodically updated information on technology transfers.

    What Information is Public?

    • Names and details of industries receiving ISRO technologies
       (furnished under RTI and available via ISRO/DoS websites such as URSC, IN-SPACe, NSIL).
    • Media publications also highlight certain transfers.

    Information Exempt from Disclosure

    Under Section 8(1)(d) of the RTI Act, NSIL does not disclose:

    • Commercial terms.
    • Payment details.
    • Copies of agreements.
       These are considered commercially sensitive or strategic.
    With reference to the Indian Regional Navigation Satellite System (IRNSS), Consider the following statements : (2018)

    1. IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits. 

    2. IRNSS covers entire India and about 5500 sq. km beyond its borders. 

    3. India will have its own satellite navigation system with full global coverage by the middle of 2019. 

    Which of the statements given above is/are correct ? 

    (a) 1 only (b) 1 and 2 only (c) 2 and 3 only (d) None