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Topic UV radiation
Asked 3 times across 2 UPSC exams over 39 years (1986–2025), peaking in 1986.
Key insights
- Most tested in CSE — 2 of 3 PYQs
- Most asked in 1986
- Recurs across 3 years (1986–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1986 → GEO 2025
How the concept evolved
Long-running — most appearances (2 of 3) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2025
Which one of the following statements is correct?
- A UV-B radiations damage DNA but do not cause mutation.
- B Cornea in human eyes absorb UV-B radiations. ✓
- C UV radiations of wavelength greater than UV-B are completely absorbed by the Earth's atmosphere.
- D UV-B radiations may be useful to treat snow blindness.
✓ Correct answer: (B)
Science & Technology › Biology & Health
CSE1987
Ozone layer of atmosphere absorbs
- A Ultraviolet rays ✓
- B Infrared rays
- C All radiations oflight
- D Cosmic rays
✓ Correct answer: (A)
Environment & Ecology › Climate Change
CSE1986
Which of the following statements about ozone layer is correct?
- A It converts UV radiations into electrical energy
- B It protects the earth's life forms by preventing the damaging UV radiations from reaching earth's surface ✓
- C It is of uniform thickness
- D None of the above
✓ Correct answer: (B)
Environment & Ecology › Climate Change
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