UPSC Themes

UPSC CSE Mains 2021 · GS3

The Nobel Prize in Physics of 2014 was jointly awarded to Akasaki, Amano and Nakamura for the invention of Blue LEDs in 1990s. How has this invention impacted the everyday life of human beings?

Theme

T152 Science in everyday life & Indian scientific achievement

What UPSC asks in this theme

Questions on blue LEDs' impact, Bose–Einstein statistics, cellulose decomposition, DRS in cricket, FRP composites, run-of-river hydro, S-400, and declining research in universities.

What to cover

Writing the answer

These notes are for the whole theme, built from all 7 of its PYQs. UPSC does not publish model answers.

More PYQs from this theme

  1. GS3202210 marks

    Each year a large amount of plant material, cellulose is deposited on the surface of Planet Earth. What are the natural process this cellulose undergoes before yielding carbon dioxide, water and other end products?

  2. GS32021

    How is S-400 air defence system technically superior to any other system presently available in the world?

  3. GS32018

    Discuss the work of ‘Bose-Einstein Statistics’ done by Prof. Satyendra Nath Bose and show how it revolutionized the field of Physics.

  4. GS32014

    Scientific research in Indian universities is declining, because a career in science is not as attractive as are business professions, engineering or administration, and the universities are becoming consumer- oriented. Critically comment.

  5. GS32013

    What do you understand by Umpire Decision Review System in Cricket? Discuss its various components. Explain how silicone tape on the edge of a bat may fool the system?

  6. GS32013

    (a) What is an FRP composite material? How are they manufactured? Discuss their applications in aviation and automobile industries. (b) What do you understand by Run-of-river hydroelectricity project? How is it different from any other hydroelectricity project?

All 20 GS3 2021 questions · Technology, Economy, Environment, Security & Disaster Management · Report a typo