Optics Question 912

Question: A boy stands straight infront of a mirror at a distance of $ 30cm $ away from it. He sees his erect image whose height is $ \frac{1}{5}th $ of his real height. The mirror he is using is

[MP PMT 1993]

Options:

A) Plane mirror

B) Convex mirror

C) Concave mirror

D) Plano-convex mirror

Show Answer

Answer:

Correct Answer: B

Solution:

Size is $ \frac{1}{5}. $ It can’t be plane and concave mirror, because both conditions are not satisfied in plane or concave mirror. Convex mirror can meet all the requirements.



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