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UPSC 1995: An air bubble in water will act like a
(a)convex mirror
(b)convex lens
(c)concave mirror
(d)concave lens
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Not attemptedCorrect Answer: (d) concave lens
The refractive index of air (inside the bubble) is lower than that of surrounding water; the two curved interfaces therefore diverge incident rays, giving the behaviour of a concave (diverging) lens. Mirrors are irrelevant because the light is transmitted, not reflected, and a convex lens would converge, not diverge, the rays. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-topic-wise-questions-physics-optics/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1995 Science & Technology question?▼
The correct answer is option (d): concave lens. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1995, GS Paper 1, as Question 115. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.