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Subject: Science and Technology

  • Consider the following statements

    Consider the following statements:
    I. It is expected that Majorana 1 chip will enable quantum computing.
    II. Majorana 1 chip has been introduced by Amazon Web Services (AWS).
    III. Deep learning is a subset of machine learning.
    Which of the statements given above are correct?

  • Consider the following statements

    Consider the following statements :
    I. No virus can survive in/ocean waters.
    II. No virus can infect bacteria.
    III. No virus can change the cellular transcriptional activity in host cells.
    Which of the statements given above are correct?

  • Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct

    Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct?
    1. It aims at developing intermediate-scale quantum computers with 50-1000 physical qubits.
    2. Its implementation includes setting up of four Thematic Hubs (T-Hubs) in academic and national R&D institutes across India.

  • DAE Inaugurates VDPP and 24 kA Prototype Sodium Cell

    Why in News?

    The Department of Atomic Energy (DAE) inaugurated the Versatile Deuterated Compounds Production Plant (VDPP) and commissioned the 24 kA Prototype Sodium Cell at the Heavy Water Board Facilities (HWBF), Vadodara, strengthening India’s indigenous capabilities in strategic nuclear materials.

    Versatile Deuterated Compounds Production Plant (VDPP)

    • Established for indigenous production of high-purity deuterated compounds and solvents.
    • Supports:
      • Advanced scientific research
      • Strategic applications
      • Frontier technologies
    • Reduces dependence on imports of specialized deuterated materials.

    What are Deuterated Compounds?

    • Compounds in which hydrogen (¹H) is replaced by deuterium (²H or D), a stable isotope of hydrogen containing one proton and one neutron.
    • Used in Nuclear technology, NMR spectroscopy, Pharmaceutical research, and Chemical and biological studies

    24 kA Prototype Sodium Cell

    • India’s first indigenous industrial-scale prototype for producing nuclear-grade sodium.
    • Nuclear-grade sodium serves as the coolant in Fast Breeder Reactors (FBRs).
    • Represents a major step toward self-reliance in strategic nuclear materials.

    Significance

    • Strengthens India’s Fast Breeder Reactor Programme.
    • Supports the second stage of India’s three-stage nuclear power programme.
    • Promotes AtmaNirbhar Bharat in critical nuclear technologies.
    • Enhances long-term energy security and technological self-reliance.
  • India’s Space Odyssey: Prelims Quick Revision

    Why in News?

    The Government highlighted India’s achievements under Space Vision 2047, focusing on self-reliance, commercialization, and human spaceflight.

    Major Missions

    • Chandrayaan-3 (2023): First soft landing near Moon’s south pole; confirmed sulphur.
    • Chandrayaan-4 (2027): Lunar sample return mission.
    • LUPEX (2027-28): ISRO-JAXA mission to explore lunar polar ice.
    • Mangalyaan: First country to reach Mars on maiden attempt.
    • Aditya-L1: India’s first solar observatory at Sun-Earth L1.
    • Venus Orbiter Mission: Planned for 2028.
    • Gaganyaan: India’s first human spaceflight programme.
    • Bharatiya Antariksh Station (BAS): First module by 2028.

    Space Technology

    • SpaDeX (2025): India became 4th nation to achieve autonomous space docking.
    • NavIC: Indigenous navigation system covering India and 1,500 km beyond.
    • VIKRAM3201: First indigenous 32-bit space microprocessor.
    • RLV-TD: Developing reusable launch vehicle technology.

    Space Economy

    • Space startups: 1 (2014) → 400+ (2026).
    • Space economy: $8 billion, targeted to reach $40-45 billion by 2030.
    • Major reforms: IN-SPACe, NSIL, Indian Space Policy 2023, Liberalised FDI.

    Launch Infrastructure

    • Operational launch vehicles: PSLV, GSLV, LVM3.
    • NGLV under development (30-ton LEO capacity).
    • Second spaceport: Kulasekarapattinam, Tamil Nadu.
    • Third launch pad approved at Sriharikota.

    International Cooperation

    • NISAR: ISRO-NASA
    • TRISHNA: ISRO-CNES
    • LUPEX: ISRO-JAXA
    • Human spaceflight cooperation with ESA and Russia.

    Space Applications

    • Disaster management, Telemedicine, PM e-VIDYA, India-WRIS, Potential Fishing Zone advisories, and Satellite Aided Search and Rescue (SASAR).
  • Fast X-ray Transients (FXTs)

    Why in the news?

    Astronomers from the Indian Institute of Astrophysics have traced the likely origin of a rare Fast X-ray Transient (FXT) event, EP241107a, detected by the Einstein Probe in November 2024.

    Key Findings

    • FXTs are energetic, non-repeating flashes of X-rays lasting from a few minutes to several hours.
    • They are a recently discovered class of transient cosmic events whose origin has remained uncertain.
    • Researchers identified a radio counterpart of FXT EP241107a using the Karl G. Jansky Very Large Array.
    • Follow-up observations were conducted using:
      • Himalayan Chandra Telescope
      • GROWTH India Telescope
      • Upgraded Giant Metrewave Radio Telescope

    Likely Origin

    • The event was probably caused by: Collapse of a massive star leading to a supernova and gamma-ray burst (GRB), or Merger of two neutron stars.
    • Researchers concluded that EP241107a is most likely an “orphan afterglow”:
      • A gamma-ray-burst-like explosion whose gamma rays were not directly detected.
      • Represents a lower-energy member of the GRB population.

    Fast X-ray Transients (FXTs)

    • Sudden flashes of low-energy X-rays.
    • Non-repeating and short-lived.
    • Fade rapidly after detection.
    • Associated with highly energetic cosmic explosions.

    Proposed Sources

    • Core-collapse supernovae.
    • Binary neutron star mergers.
    • Magnetars (highly magnetized neutron stars).
    • Tidal disruption events involving white dwarfs and black holes.
    • Gamma-ray bursts (GRBs).

    Gamma-Ray Bursts (GRBs)

    • Most energetic explosions known in the Universe.
    • Emit intense gamma radiation for a few milliseconds to several minutes.
    • Associated with the collapse of massive stars (Long GRBs) and Neutron star mergers (Short GRBs).
    • Followed by multi-wavelength “afterglows” in X-ray, optical, and radio bands.

    Neutron Star

    • Extremely dense remnant of a massive star after a supernova.
    • Mass ≈ 1.4-2 solar masses compressed into a sphere about 20 km across.
    • Composed mainly of neutrons.

    [2023] Consider the following pairs: Objects in space : Description
    1. Cepheids : Giant clouds of dust and gas in space
    2. Nebulae : Stars which brighten and dim periodically
    3. Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse
    How many of the above pairs are correctly matched ?

    [A] Only one

    [B] Only two

    [C] All three

    [D] None

  • Advancing Electrolyte Engineering for Durable and Affordable Aqueous Batteries

    Why in the news?

    Scientists at the Institute of Nano Science and Technology (INST), Mohali, under the Department of Science and Technology (DST), have developed a novel electrolyte additive (BDIM) that significantly improves the performance and lifespan of Aqueous Zinc-Ion Batteries (AZIBs).

    Key Highlights

    • AZIBs are emerging as safer, cheaper, and more sustainable alternatives to lithium-ion batteries.
    • Major challenges:
      • Zinc dendrite formation
      • Hydrogen Evolution Reaction (HER)
      • Corrosion of zinc anode
      • Poor cycling stability
    • Researchers developed BDIM (1,3-bis(1,3-dicarboxypropyl)-1H-imidazole-3-ium chloride) as an electrolyte additive.
    • BDIM selectively adsorbs on the zinc surface and occupies the Inner Helmholtz Plane (IHP).
    • It displaces water molecules, thereby:
      • Suppressing hydrogen evolution
      • Reducing corrosion
      • Preventing dendrite growth
      • Enhancing battery life and safety
    • Researchers used: Ultramicroelectrode (UME) and Fast-Scan Cyclic Voltammetry (FSCV)
      to study zinc deposition mechanisms.

    Significance

    • Extends battery lifespan without costly material redesign.
    • Improves safety and reliability of rechargeable batteries.
    • Supports large-scale renewable energy and grid-storage applications.
    • Can reduce maintenance costs of energy-storage infrastructure.

    Prelims Facts

    • AZIB Electrolyte: Water-based, making it non-flammable and safer than lithium-ion batteries.
    • Inner Helmholtz Plane (IHP): Region near the electrode surface where electrochemical reactions occur.
    • Hydrogen Evolution Reaction (HER): Undesirable side reaction that reduces battery efficiency.
  • Indigenous Air Cushion Vehicle (ACV) Inducted into Indian Coast Guard

    Why in News?

    The Indian Coast Guard (ICG) inducted the first of six indigenously built Air Cushion Vehicles (ACVs), or hovercraft, at Goa on 18 June 2026. The vessels are being constructed by Chowgule & Company Private Limited under a Ministry of Defence contract.

    Key Highlights

    • First ACV inducted into ICG service in Goa.
    • Part of a contract for six indigenous hovercraft.
    • Contract signed between the Ministry of Defence and Chowgule & Company Pvt. Ltd. on 24 October 2024.
    • Supports the vision of Aatmanirbhar Bharat.
    • Enhances India’s indigenous maritime manufacturing capability.

    What is an Air Cushion Vehicle (ACV)?

    • A hovercraft that travels on a cushion of pressurised air.
    • Can operate over Water, Mudflats, Marshes, Sandbanks, Shallow and coastal areas
    • Combines features of both marine vessels and aircraft.
  • GRAPES-3: A Cosmic-Ray Tracker

    Why in the news?

    Researchers from India and Japan used the Gamma Ray Astronomy PeV EnergieS phase-3 (GRAPES-3) telescope to analyse 22 years of muon data, enabling real-time monitoring of changes in the Earth’s upper atmosphere.

    What is GRAPES-3?

    • GRAPES-3 (Gamma Ray Astronomy PeV EnergieS phase-3) is a muon telescope and cosmic-ray observatory located at Ooty, Tamil Nadu.
    • It detects muons, rather than visible light.
    • It is designed to study Cosmic rays, Solar magnetic fields, Space weather, and Atmospheric processes.

    What are Muons?

    • Muons are high-energy subatomic particles produced when cosmic rays collide with atoms in the Earth’s upper atmosphere.
    • They can penetrate deep into the Earth’s surface due to their high energy.

    How does GRAPES-3 Work?

    • Comprises 16 detector modules.
    • Each module contains 232 proportional counters filled with argon-methane gas and a tungsten wire.
    • Passing muons generate electrical pulses, recorded as “hits.”
    • Four layers of detectors arranged at right angles help determine the trajectory and angle of incoming muons.
    • Reinforced concrete layers filter out low-energy particles, allowing only high-energy muons to be detected.

    Significance

    • Enables real-time monitoring of upper atmospheric temperature changes.
    • Helps study the Sun’s magnetic field and space weather.
    • Improves understanding of cosmic-ray interactions with Earth’s atmosphere.
    • Contributes to research in astroparticle physics and atmospheric science.

    Value Addition

    • Cosmic Rays: High-energy charged particles originating from outer space.
    • Space Weather: Variations in the space environment caused by solar activity that can affect satellites, communication systems, and power grids.

    [2017] The terms ‘Event Horizon’, ‘Singularity’, ‘String Theory’ and ‘Standard Model’ are sometimes seen in the news in the context of

    [A] Observation and understanding of the Universe

    [B] Study of the solar and the lunar eclipses

    [C] Placing satellites in the orbit of the Earth

    [D] Origin and evolution of living organisms on the earth

  • Drone revolution and modern warfare

    Why in the News?

    The Ukraine War, the Israel-Hezbollah conflict, and broader West Asian confrontations demonstrate that mass-produced unmanned aerial systems (UAS) have become central to modern warfare. For the first time, relatively inexpensive, commercially derived drones have challenged the dominance of traditional military platforms such as tanks, artillery, combat aircraft, and precision-guided missile systems.

    Why has the traditional model of military superiority been challenged?

    1. Conventional Military Paradigm: Battlefield superiority historically depended on combat aircraft, tanks, artillery, warships, air-defence systems, precision-guided missiles, and advanced intelligence networks.
    2. Resource Advantage: Large military budgets enabled technologically advanced states to dominate battlefields.
    3. Asymmetric Warfare: Smaller states and non-state actors relied on guerrilla tactics, ambushes, and unconventional warfare to offset conventional disadvantages.
    4. Paradigm Shift: Commercially derived drones have disrupted this model by providing low-cost precision strike capabilities at scale.
    5. Persistent Battlespace: Modern battlefields no longer provide safe rear areas as drones can detect, track, and engage targets across the operational depth.

    How has the Ukraine War become the laboratory of industrial-scale drone warfare?

    1. Rapid Adaptation: Ukraine converted commercially available drones originally designed for photography, mapping, and surveillance into military platforms.
    2. Transformation of Role: Drones evolved from intelligence-gathering tools into active strike systems.
    3. Full Integration: By 2024, drones became integrated across almost every layer of Ukrainian combat operations.
    4. Operational Functions: Drones support battlefield surveillance, frontline targeting, artillery correction, logistics interdiction, and deep-strike missions.
    5. Replication Effect: Ukraine’s drone warfare model has subsequently influenced conflicts across West Asia.
    6. Historic First: Ukraine represents the world’s first industrial-scale, drone-intensive conflict.

    How did FPV drones revolutionise battlefield operations?

    First-Person View (FPV) drones allow you to fly while wearing specialized video goggles that stream a live, real-time feed directly from the drone’s onboard camera. Unlike standard camera drones that fly via GPS stabilization, FPV flying offers total acrobatic freedom and an immersive, cockpit-like experience.

    1. FPV (First Person View) Technology: Uses onboard cameras transmitting live video feeds to operators through virtual-reality-style goggles.
    2. Operational Advantage: Ensures precision, manoeuvrability, responsiveness, and low operational costs.
    3. Combat Variants: Includes strike drones, bombers, interceptors, and long-range attack systems.
    4. Cost Asymmetry: Systems costing only a few hundred dollars can destroy armoured vehicles and equipment worth millions.
    5. Expanded Combat Envelope: Thermal-imaging and night-vision variants enable round-the-clock operations.
    • Examples
      • Vampire Hexacopter (“Baba Yaga”): Heavy-lift drone used for combat missions.
      • FPV Kamikaze Drones: Quadcopters carrying explosive payloads such as: Rocket-propelled grenade (RPG) warheads. and Purpose-built munitions.

        How has Ukraine developed a layered drone ecosystem?

        1. Loitering Munitions
          1. RAM II: Short-range precision loitering munition used alongside reconnaissance drones.
          2. UJ-31 Zozulya: Aerially deployed “parasite drone” carried by the UJ-22 Airborne UAV to extend operational reach.
        2. Reconnaissance Systems
          1. Shark Drone: Provides reconnaissance support.
          2. PD-2: Supports surveillance and targeting missions.
        3. Bomber Drones
          1. DJI Mavic 3 Adaptations: Converted from civilian applications to military bomber roles.
          2. DJI Matrice 300 RTK Adaptations: Modified to carry Grenades, Anti-tank mines and Other munitions.
          3. Operational Benefit: Survive missions and conduct multiple sorties unlike kamikaze drones.
        4. Deep Strike Systems
          1. Pegasus FPV Strike Drone: Supports tactical strike operations.
          2. One-Way Attack Drones: Conduct deep strikes against:
            1. Logistics hubs.
            2. Airbases.
            3. Critical infrastructure.
        5. Parasite Drone Concept: UJ-31 Zozulya is carried by the UJ-22 Airborne UAV and released mid-air, extending operational range and penetration capability.

        Why are fibre-optic drones considered a major battlefield innovation?

        A fiber-optic drone is an unmanned aerial vehicle (UAV) that tethers to a ground controller via a thin, hair-like optical fiber cable. Deployed primarily as first-person view (FPV) loitering munitions or reconnaissance craft, they transmit control signals and high-bandwidth video through light, rendering them completely immune to electronic warfare (EW) jamming.

        1. Electronic Warfare Resistance: Conventional drones rely on radio-frequency links vulnerable to jamming.
        2. Fibre-Optic Guidance: Uses physical fibre-optic cables spooled during flight.
        3. Reduced Vulnerability: Ensures mission continuity despite electronic warfare interference.
        4. Operational Advantage: Enables operations in heavily contested electromagnetic environments.
        5. Strategic Significance: Restores drone effectiveness where conventional systems would fail.

        How does Hezbollah employ drones in its military strategy?

        Iranian Supply Chain: Relies heavily on Iranian-origin drone platforms.

        Key Platforms

        1. Ababil Series: Supports ISR and strike missions.
        2. Mohajer Series: Provides medium-range reconnaissance capabilities.
        3. Shahed Series: Performs surveillance and attack functions.

        Specific Systems

        1. Mohajer-4: Provides ISR coverage.
        2. Shahed-129: Supports medium- to long-range ISR missions.
        3. Shahed-136: Functions as a dedicated one-way strike loitering munition.

        Technological Adaptation

        1. Fibre-Optic FPV Drones: Adopted to overcome Israeli electronic warfare measures.

        How has Israel responded to the drone challenge?

        1. Layered Counter-Drone Architecture
          1. Electronic Warfare Systems: Supports drone detection and disruption.
          2. Specialised Radar Arrays: Improves low-altitude drone tracking.
        2. Emerging Technologies/AI-Enabled Iron Drone Raider:
          1. Neutralises drones through kinetic interception.
          2. Uses net capture mechanisms.
          3. Employs direct collision tactics.
          4. Reduces reliance on expensive missile interceptors.
        3. Integrated UAV Force Structure
          1. Heron Systems: Provide long-endurance ISR coverage.
          2. Armed Drones: Support precision strike missions.
          3. Loitering Munitions: Enable rapid reconnaissance-strike integration.

        How does Iran represent a distinct model of drone warfare?

        1. Strategic Integration: Uses drones as instruments of national deterrence and power projection, not merely battlefield weapons.
        2. Proxy Warfare Network: Supplies drone capabilities to allies and proxy groups across Iraq, Syria, Lebanon, and Yemen.
        3. IRGC-Led Doctrine: Integrates drone development and deployment into the Islamic Revolutionary Guard Corps’ military strategy.
        4. Indigenous Production: Manufactures Shahed-series drones domestically, ensuring scalability and strategic autonomy.
        5. Low-Cost Regional Influence: Projects military power and threatens adversary assets across West Asia without maintaining expensive conventional air forces.

        Why is the drone revolution fundamentally an economic revolution?

        1. Cost Efficiency: Cheap unmanned systems replace expensive military platforms.
        2. Production Scale: Industrial manufacturing capacity increasingly determines battlefield success.
        3. Attrition Advantage: Large-scale drone production offsets losses.
        4. Battlefield Economics: Few hundred-dollar drones can destroy million-dollar platforms.
        5. Industrial Endurance: Success depends on continuous production and adaptation.
        6. Technological Adaptability: Drone systems are rapidly reconfigured for evolving battlefield requirements.

        Conclusion

        Modern warfare is transitioning from a platform-centric model to a drone-centric ecosystem characterised by low-cost precision, continuous reconnaissance, and rapid innovation. As drones become central to deterrence, power projection, and battlefield operations, military advantage will increasingly depend on the ability to build, deploy, adapt, and neutralise unmanned systems at scale.

        Value Addition

        Revolution in Military Affairs (RMA)

        1. Integration of emerging technologies into warfare.
        2. Alters doctrine, force structure, and operational concepts.
        3. Comparable to:
          1. Gunpowder Revolution.
          2. Mechanised Warfare.
          3. Nuclear Revolution.
          4. Information Warfare.

        Emerging Technologies in Warfare

        Artificial Intelligence

        1. Autonomous targeting.
        2. Swarm coordination.
        3. Decision support systems.

        Electronic Warfare

        1. Jamming.
        2. Spoofing.
        3. Signal disruption.

        Autonomous Systems

        1. Loitering munitions.
        2. Unmanned combat aerial vehicles.

        Network-Centric Warfare

        1. Real-time ISR integration.
        2. Sensor-to-shooter connectivity.

        PYQ Relevance

        [UPSC 2023] The use of unmanned aerial vehicles (UAVs) by our adversaries across the borders to ferry arms/ammunitions, drugs, etc., is a serious threat to internal security. Comment on the measures being taken to tackle this threat.

        Linkage: The PYQ examines the security implications of the growing use of drone technology. The article discusses how drones have become central to modern warfare, highlighting the need for advanced counter-drone capabilities to address emerging military and internal security threats.