2.6 Inventions, Discoveries & Scientific-Technological Development

Invention Versus Discovery

An invention is a device or process created by human ingenuity that did not previously exist — the steam engine, the telephone. A discovery is the recognition of something that already existed but was unknown — gravity, penicillin, the electron. Objective papers occasionally ask candidates to classify an item rather than name its author, so hold the distinction clearly.

Classical Inventions and Their Inventors

Four of these — Watt's engine, Davy's lamp, Bessemer's converter and Diesel's engine — are directly ancestral to the coal and heavy-engineering industries a CIL Management Trainee will work in.

Major Discoveries

Indian Science: People and Institutions

Nobel laureates connected with India in the sciences:

• C. V. Raman — Physics, 1930, for the Raman effect. The only Indian citizen to win a science Nobel for work done in India. National Science Day is observed on 28 February, the date of his discovery.
• Har Gobind Khorana — Physiology or Medicine, 1968, for interpreting the genetic code.
• Subrahmanyan Chandrasekhar — Physics, 1983, for the theory of stellar structure; the Chandrasekhar limit bears his name.
• Venkatraman Ramakrishnan — Chemistry, 2009, for studies of the ribosome.

Other figures who recur: Homi J. Bhabha, architect of India's nuclear programme; Vikram Sarabhai, father of the Indian space programme; A. P. J. Abdul Kalam, missile programme and eleventh President; M. S. Swaminathan, Green Revolution; Satyendra Nath Bose, Bose-Einstein statistics; Srinivasa Ramanujan, whose birthday, 22 December, is National Mathematics Day.

India's Scientific and Technological Programmes

Space

Launch vehicles to recognise: PSLV (Polar Satellite Launch Vehicle), GSLV (Geosynchronous Satellite Launch Vehicle) and LVM3, the heavy-lift vehicle used for Chandrayaan-3.

Nuclear

India follows a three-stage nuclear programme conceived by Homi Bhabha: pressurised heavy water reactors using natural uranium, then fast breeder reactors using plutonium, and finally thorium-based reactors exploiting India's large monazite thorium reserves. Tarapur in Maharashtra is the oldest station; Kudankulam in Tamil Nadu is the largest. Nuclear power is regulated by the Atomic Energy Regulatory Board, and the Department of Atomic Energy reports directly to the Prime Minister.

Research organisations

CMPDIL is worth remembering precisely because it is the research and planning arm inside Coal India itself — a plausible general-awareness item on a CIL paper.

Technology in the Coal Sector

Contemporary technological development in Indian coal mining is a defensible current-affairs target for this specific exam:

• Surface miners that cut and crush coal without drilling and blasting, reducing dust and vibration.
• Continuous miners and longwall systems for higher underground productivity.
• First-mile connectivity projects replacing road transport of coal with silos and conveyor systems to cut dust and diesel use.
• Coal gasification, promoted through national policy to convert coal into syngas for chemicals, fertiliser and hydrogen.
• Mine methane capture, converting a potent greenhouse gas into usable fuel.

These connect the general-awareness paper to the sector the candidate is actually joining, and the Paper-I syllabus explicitly lists Awareness regarding Coal Sector in India as a bullet.