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UPSC 1996: When a mirror is rotated by an angle of θ, the reflected ray will rotate by
(a)0°
(b)θ / 2
(c)θ
(d)2θ
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Not attemptedCorrect Answer: (d) 2θ
When a plane mirror is rotated through an angle θ, the angle of incidence and the angle of reflection each change by θ. The reflected ray therefore turns through 2θ relative to its original direction, making option (d) correct. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1996-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1996 Science & Technology question?▼
The correct answer is option (d): 2θ. 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 1996, GS Paper 1, as Question 116. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
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.