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KVPY SA Exam 2013 Question Paper

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Question : 22

Total: 80

A horizontal parallel beam of light passes through a vertical convex lens o f focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.

M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is

15°
30°
45°
60°

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