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Chapter 12 of 16

Science & Technology

In the PSSSB JE Civil syllabus under General Awareness · 3 parts

📑 Contents (22 sections)

Part 1 of 3

Science & Technology in India

Last reviewed 30 Sept 2026 · Facts as of 30 Sept 2026 · 10 min read

Institutions

Institution Note
Department of Science and Technology (DST) nodal department (1971); Science and Engineering Research Board (SERB); National Science and Technology Management Information System; INSPIRE scholarships; National Science Day — 28 February (Raman Effect, 1928)
Council of Scientific and Industrial Research (CSIR) 1942; a chain of 37+ laboratories (NPL Delhi, NCL Pune, CDRI Lucknow, CECRI Karaikudi, CFTRI Mysuru, NGRI Hyderabad, CBRI Roorkee); the National Physical Laboratory keeps the standard of time and measures
Indian Council of Medical Research (ICMR) 1911 (as the Indian Research Fund Association); the apex body for biomedical research; National Institute of Virology, Pune
Indian Council of Agricultural Research (ICAR) 1929; IARI (Pusa, Delhi), IVRI (Izatnagar), CIFT (Kochi)
Department of Atomic Energy (DAE) and Atomic Energy Commission (AEC) 1954 / 1948 (Homi J. Bhabha the first chairman); BARC (Trombay), IGCAR (Kalpakkam), RRCAT (Indore), NPCIL (nuclear power)
ISRO / Department of Space see the Space Programme note
DRDO see the Defence Technology note
Department of Biotechnology (DBT) 1986; BIRAC; the National Biotechnology Development Strategy
Ministry of Electronics and Information Technology (MeitY) NIC, CERT-In (cyber security), C-DAC (the PARAM supercomputers), Digital India (2015), India Semiconductor Mission (2021), IndiaAI Mission (2024)
Indian Institute of Science (IISc), IITs, IISERs, TIFR (Mumbai, 1945), Raman Research Institute, Bose Institute (Kolkata, 1917, founded by J. C. Bose), Indian Statistical Institute (P. C. Mahalanobis)
Survey of India (1767), Geological Survey of India (1851), India Meteorological Department (IMD) (1875), National Centre for Seismology, Wadia Institute of Himalayan Geology
National Innovation Foundation, Atal Innovation Mission (AIM) (NITI Aayog), Startup India, Anusandhan National Research Foundation (2023)
Vigyan Prasar, Indian Science Congress (annual, 3 January; started in 1914)

Scientists and their contributions

Scientist Contribution
Aryabhata (476 CE) Aryabhatiya; the value of pi; the Earth rotates on its axis; the first Indian satellite (1975) is named after him
Brahmagupta, Bhaskara zero, algebra; Lilavati
Sushruta, Charaka ancient surgery (Sushruta Samhita), medicine (Charaka Samhita)
Srinivasa Ramanujan mathematician; number theory; the Hardy–Ramanujan number 1729; National Mathematics Day — 22 December
Jagadish Chandra Bose plant physiology (the crescograph), radio waves and microwave optics; the Bose Institute
C. V. Raman Raman Effect (1928); Nobel Prize in Physics 1930 (the first Asian in science)
Meghnad Saha the Saha ionisation equation (astrophysics)
S. N. Bose Bose–Einstein statistics; the particle boson is named after him
Homi Jehangir Bhabha the father of India's nuclear programme (three-stage nuclear power programme); TIFR; AEC; a first chairman
Vikram Sarabhai the father of the Indian space programme; the Physical Research Laboratory (Ahmedabad) and ISRO
Satish Dhawan rocket scientist; ISRO chairman; the Satish Dhawan Space Centre (Sriharikota)
A. P. J. Abdul Kalam the "Missile Man of India"; SLV-III (Rohini satellite), Agni and Prithvi; the 11th President (2002–07)
Harish-Chandra, S. Chandrasekhar mathematics; Chandrasekhar limit (1.4 solar masses — white dwarf stars; Nobel Prize 1983)
Har Gobind Khorana Nobel Prize in Medicine 1968 (the genetic code)
Venkatraman Ramakrishnan Nobel Prize in Chemistry 2009 (the ribosome's structure)
Amartya Sen Nobel Prize in Economics 1998; welfare economics
Abhijit Banerjee Nobel Prize in Economics 2019 (with Esther Duflo and Michael Kremer; experimental approach to reducing poverty)
Kailash Satyarthi Nobel Peace Prize 2014 (child rights)
Rabindranath Tagore Nobel Prize in Literature 1913 (Gitanjali; the first non-European)
Mother Teresa Nobel Peace Prize 1979
Verghese Kurien White Revolution
M. S. Swaminathan Green Revolution; the first World Food Prize (1987)
Salim Ali the "Birdman of India"
Birbal Sahni palaeobotanist; the Birbal Sahni Institute of Palaeosciences (Lucknow)
Kalpana Chawla the first woman of Indian origin in space (1997; she died in the Columbia disaster 2003)
Rakesh Sharma the first Indian in space (1984, aboard the Soviet Soyuz T-11); Shubhanshu Shukla flew to the International Space Station in 2025 (Axiom-4)
Tessy Thomas the "Missile Woman of India"
Jayant Narlikar astrophysicist; IUCAA (Pune)
P. C. Ray the "father of Indian chemistry" (a Bengal Chemicals founder)
Sam Pitroda C-DOT, the telecom revolution
Vijay Bhatkar the PARAM supercomputer

(Nobel laureates of Indian origin or association: Tagore (1913), C. V. Raman (1930), H. G. Khorana (1968), Mother Teresa (1979), S. Chandrasekhar (1983), Amartya Sen (1998), V. S. Naipaul (2001 Literature), Venkatraman Ramakrishnan (2009), Kailash Satyarthi (2014), Abhijit Banerjee (2019).)

Part 2 of 3

India's Space Programme

Last reviewed 30 Sept 2026 · Facts as of 30 Sept 2026 · 11 min read

A note on status. Launch schedules and mission statuses change. The historic facts are stable; for the latest launch or mission status (for example Gaganyaan's crewed flight), check ISRO's website.

History and organisation

Year Event
1962 INCOSPAR (Indian National Committee for Space Research) set up under the DAE (Vikram Sarabhai, with Homi Bhabha's support)
1963 first sounding rocket launched from Thumba (TERLS, Kerala) — a Nike-Apache from the magnetic equator (21 November 1963)
15 August 1969 ISRO (Indian Space Research Organisation) formed; headquarters Bengaluru
1972 Department of Space and the Space Commission set up (June 1972)
1975 Aryabhata, the first Indian satellite (launched from the USSR's Kapustin Yar by an Intercosmos rocket, 19 April 1975)
1979 Bhaskara-I (an Earth-observation satellite)
1980 Rohini (RS-1) launched by SLV-3 — India's first satellite launched by an Indian launch vehicle; APJ Abdul Kalam was the project director; India became the sixth country with launch capacity
1981 APPLE (Ariane Passenger Payload Experiment) — the first experimental communication satellite
1982 INSAT-1A (failed); INSAT-1B (1983) successful
1984 Rakesh Sharma on the Soviet Soyuz T-11 — the first Indian in space (3 April 1984)
1988 IRS-1A (the first operational remote-sensing satellite)
1993 the first PSLV flight (PSLV-D1) failed
1994 PSLV-D2 — a success
2001 the first GSLV flight
2008 Chandrayaan-1; PSLV-C9 launched 10 satellites at once
2013 Mars Orbiter Mission (Mangalyaan)
2014 GSLV Mk-II with the indigenous cryogenic stage; NavIC operational from 2016
2015 AstroSat, the first Indian astronomy observatory
2017 PSLV-C37 launched a record 104 satellites in one launch (15 February 2017)
2019 Chandrayaan-2 (the lander Vikram lost contact); Mission Shakti (an anti-satellite test, 27 March)
2020 IN-SPACe created; a space sector opened to the private sector
2023 Chandrayaan-3 (soft landing on 23 August 2023); Aditya-L1 (2 September)
2024 XPoSat (1 January) — X-ray polarimetry; SPADEX (December) — docking demonstration
2025 SpaDeX docking achieved in January 2025 — India became the fourth country to dock spacecraft in orbit; ISRO's 100th launch (GSLV-F15, January 2025); Group Captain Shubhanshu Shukla flew to the ISS on Axiom-4 (June 2025)
  • Chairmen (selected): Vikram Sarabhai (1963–71), Satish Dhawan (1972–84), U. R. Rao, K. Kasturirangan, G. Madhavan Nair, K. Radhakrishnan, A. S. Kiran Kumar, K. Sivan, S. Somanath (2022–25), V. Narayanan (from January 2025).
  • National Space Day — 23 August (to mark the Chandrayaan-3 landing).
  • Vikram Sarabhai is the "father of the Indian space programme"; Satish Dhawan built ISRO; U. R. Rao the "Satellite Man of India".

Centres

Centre Location Role
ISRO Headquarters Bengaluru
Vikram Sarabhai Space Centre (VSSC) Thiruvananthapuram launch vehicles; the Thumba Equatorial Rocket Launching Station
U R Rao Satellite Centre (URSC, formerly ISAC) Bengaluru satellite building
Satish Dhawan Space Centre (SDSC-SHAR) Sriharikota (Andhra Pradesh) the main launch site; the first launchpad 1971; Kulasekarapattinam (Tamil Nadu) is being developed as a second spaceport for small satellites
Liquid Propulsion Systems Centre (LPSC) Valiamala (Kerala) and Bengaluru liquid and cryogenic engines
Space Applications Centre (SAC) Ahmedabad communication and remote-sensing payloads
National Remote Sensing Centre (NRSC) Hyderabad data reception and processing
ISRO Telemetry, Tracking and Command Network (ISTRAC) Bengaluru
Master Control Facility Hassan (Karnataka) and Bhopal INSAT control
Human Space Flight Centre (HSFC) Bengaluru Gaganyaan
Indian Institute of Space Science and Technology (IIST) Thiruvananthapuram
Physical Research Laboratory (PRL) Ahmedabad space science
Antrix Corporation (1992) and NewSpace India Limited (NSIL, 2019) commercial arms of ISRO
IN-SPACe Ahmedabad the regulator and promoter of private space activity (2020)

Launch vehicles

Vehicle Notes
SLV-3 (Satellite Launch Vehicle) first Indian launch vehicle (1979–83); 4 stages; solid fuel; carried the Rohini satellite to low-Earth orbit
ASLV Augmented SLV (1987–94); to test technologies
PSLV (Polar Satellite Launch Vehicle) the "workhorse" of ISRO; four stages (solid–liquid–solid–liquid); places satellites in sun-synchronous polar orbits (up to about 1,750 kg); flew the Chandrayaan-1 and Mangalyaan missions; PSLV-XL, PSLV-CA
GSLV (Geosynchronous SLV) three stages; GSLV Mk-II uses the indigenous cryogenic upper stage (CE-7.5) — tested successfully in 2014; carries the INSAT/GSAT communication satellites to geostationary transfer orbit (GTO) (about 2,500 kg)
LVM3 (formerly GSLV Mk-III) the heavy-lift vehicle; up to 4,000 kg to GTO and about 8,000 kg to LEO; CE-20 cryogenic engine; launched Chandrayaan-2 and Chandrayaan-3, and OneWeb satellites; the vehicle for Gaganyaan (human-rated as HLVM3)
SSLV (Small Satellite Launch Vehicle) for small satellites (up to 500 kg) on demand; first flight 2022 (the second in 2023 was successful)
RLV-TD (Reusable Launch Vehicle Technology Demonstrator) a winged reusable-vehicle test; RLV LEX landing experiments (2023–24)
Next Generation Launch Vehicle (NGLV) a planned heavier reusable vehicle
Agnibaan (Agnikul) and Vikram-S / Vikram-1 (Skyroot Aerospace) private launch vehicles; Vikram-S flew in November 2022 (the first Indian private rocket launch, from Sriharikota); Agnikul's semi-cryogenic engine launched in 2024
  • Cryogenic engine: uses liquid hydrogen (fuel) and liquid oxygen (oxidiser) at very low temperatures. India became the sixth country (after the USA, Russia, France, Japan, China) to have cryogenic technology (with the 2014 success); the earlier Russian engines were used from 2001.
  • Orbits: LEO (160–2,000 km), MEO, GEO (about 35,786 km; the period of 24 hours; above the equator), Sun-synchronous polar orbit (SSPO) (about 600–800 km) for Earth observation, polar and transfer orbits.

Part 3 of 3

Defence Technology & Missiles of India

Last reviewed 30 Sept 2026 · Facts as of 30 Sept 2026 · 12 min read

A note on status. Induction dates, test results and inventories change. The classifications, ranges (approximate) and the names below are the stable core; for the latest tests and inductions check the Ministry of Defence and DRDO announcements.

Defence organisation

  • Supreme Commander: the President of India (Article 53). The Ministry of Defence (MoD) is headed by the Defence Minister; departments: Defence, Defence Production, Defence Research & Development (DRDO), Ex-Servicemen Welfare, Military Affairs (DMA, 2020). The Defence Acquisition Council (DAC) decides purchases; the Defence Planning Committee; the National Security Council (the National Security Adviser).
  • Armed forces: Indian Army (Chief of the Army Staff, 15 January is Army Day), Indian Navy (Chief of the Naval Staff, 4 December is Navy Day), Indian Air Force (Chief of the Air Staff, 8 October is Air Force Day, founded 1932). The Indian Coast Guard (1978; Ministry of Defence; the "Vayam Rakshamah"). Territorial Army (1949). Central Armed Police Forces (under the MHA): BSF (border with Pakistan and Bangladesh), CRPF, CISF, ITBP (the China border), SSB (Nepal and Bhutan), Assam Rifles, NSG ("Black Cats").
  • Chief of Defence Staff (CDS): the post created in December 2019 (implemented on 1 January 2020) — the first CDS was General Bipin Rawat (died in a helicopter crash in December 2021); General Anil Chauhan succeeded (2022). The CDS heads the Department of Military Affairs and promotes jointness and theatre commands.
  • Commands: the Army has 6 operational commands (Northern, Western, Eastern, Central, Southern, South-Western) + ARTRAC; the Navy 3 (Western — Mumbai, Eastern — Visakhapatnam, Southern — Kochi); the Air Force 7 (Western, Eastern, Central, Southern, South-Western, Training, Maintenance). Andaman & Nicobar Command (2001) is the first tri-service command; the Strategic Forces Command (2003) manages nuclear weapons.
  • Ranks: Field Marshal (five-star; K. M. Cariappa (the first Indian Commander-in-Chief, 1949; Field Marshal 1986) and Sam Manekshaw (1973; the 1971 war hero)); Marshal of the Air Force Arjan Singh (2002).
  • Awards: Param Vir Chakra, Maha Vir Chakra, Vir Chakra (wartime gallantry); Ashoka Chakra, Kirti Chakra, Shaurya Chakra (peacetime). The first Param Vir Chakra: Major Somnath Sharma (1947). See the Awards note.
  • Institutions: National Defence Academy (NDA), Khadakwasla, Pune; Indian Military Academy (IMA), Dehradun; Officers Training Academy, Chennai; Defence Services Staff College, Wellington; National Defence College, Delhi; Indian Naval Academy, Ezhimala (Kerala); Air Force Academy, Dundigal (Hyderabad).
  • Defence Budget: among the largest in the world (about ₹6.8 lakh crore in 2025–26; check the latest); Defence exports crossed ₹21,000 crore in 2023–24 and more in 2024–25 (BrahMos, Akash, artillery, ammunition, Dornier).

DRDO

  • Defence Research and Development Organisation — formed in 1958 (Ministry of Defence); HQ New Delhi; 60+ laboratories (DRDL Hyderabad, ADE Bengaluru, VRDE Ahmednagar, DMRL Hyderabad, ARDE Pune, LRDE Bengaluru, DIPAS, INMAS); the chairman also serves as the Secretary of the Department of Defence R&D; Kalam led it (as the Scientific Adviser). DRDO Young Scientist Labs, Technology Development Fund (TDF).
  • Major developments: missiles (IGMDP), the Arjun main battle tank, the LCA Tejas (with HAL/ADA), Pinaka rocket launchers, Akash SAM, Nag ATGM, AEW&C (Netra), Kaveri engine, INSAS rifle (replaced by newer rifles), Dhanush and ATAGS artillery, Advanced Light Torpedoes, Astra BVR missiles, Agni-Prime, hypersonic technology (HSTDV), directed-energy weapons, the Mission Shakti anti-satellite test (2019), and the anti-Covid 2-DG drug.

Integrated Guided Missile Development Programme (IGMDP)

Launched in 1983 under Dr APJ Abdul Kalam, at DRDL Hyderabad, to make India self-reliant in missiles. It developed five missile systems — Prithvi, Agni, Trishul, Akash, Nag — and was declared complete in 2008.

Types of missile

  • By launch and target: surface-to-surface (SSM), surface-to-air (SAM), air-to-air (AAM), air-to-surface, anti-tank (ATGM), anti-ship, submarine-launched.
  • By range: short-range (SRBM: up to 1,000 km), medium-range (MRBM: 1,000–3,000 km), intermediate-range (IRBM: 3,000–5,500 km), intercontinental (ICBM: over 5,500 km).
  • By trajectory: ballistic (a powered rise and free fall) and cruise (a continuously powered flight in the atmosphere at low altitudes). Hypersonic (Mach 5+).
  • Guidance: inertial, GPS/NavIC, terminal radar or infra-red homing; MIRV (Multiple Independently targetable Re-entry Vehicles) — Agni-V has MIRV capability (Mission Divyastra, March 2024).

Major Indian missiles

Missile Type Approx. range Notes
Prithvi-I, II, III surface-to-surface SRBM 150 / 250–350 / 350–600 km the first missile developed under the IGMDP (1988); liquid-fuelled; Prithvi-II is the Air Force's; Dhanush is the naval variant
Agni-I MRBM ~700–900 km solid-fuelled; the road-mobile
Agni-II MRBM ~2,000–3,000 km
Agni-III IRBM ~3,000–3,500 km
Agni-IV IRBM ~3,500–4,000 km road-mobile
Agni-V ICBM class 5,000+ km (more than 5,000) a three-stage solid-fuelled; a canisterised; MIRV tested in 2024
Agni-Prime (Agni-P) a new-generation medium-range ~1,000–2,000 km canisterised; a rail-based launch was tested in 2025
Akash SAM (surface-to-air) 25–45 km a medium-range; the ramjet; the Akash-NG new generation; Akash Prime
Trishul SAM 9 km short-range; the programme is closed
Nag anti-tank guided (fire-and-forget) 4–8 km a "Helina" (a helicopter-launched Nag), NAMICA (a tracked launcher)
BrahMos supersonic cruise missile 290 km (extended-range versions ~450–800 km) India–Russia joint venture (BrahMos Aerospace); the name from Brahmaputra + Moskva; speed about Mach 2.8–3; launched from land, sea, submarine and air (Su-30MKI)
Astra BVR air-to-air 100+ km Astra Mk-1, Mk-2
Nirbhay subsonic long-range cruise ~1,000 km
Pralay short-range quasi-ballistic 150–500 km
SFDR (Solid Fuel Ducted Ramjet) air-to-air tested 2018
MRSAM (Barak-8) SAM (India–Israel) ~70 km naval and land versions
QRSAM quick-reaction SAM ~30 km
Shaurya hypersonic tactical ~700–1,900 km canister-launched; the land version of K-15
K-15 Sagarika / K-4 / K-5 / K-6 submarine-launched ballistic (SLBM) 750 / 3,500 / 5,000 / 6,000 km for the Arihant class
Anti-Ballistic Missile (BMD) Prithvi Air Defence (PAD) / Advanced Air Defence (AAD) two-tier defence
Long-range hypersonic missile (LRAShM) anti-ship ~1,500 km tested Nov 2024

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