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Q.

A man 1.6 m tall wishes to see his full length image in a plane mirror. The minimum length of mirror that he must buy is

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a

0.8 m

b

1 m

c

1.6 m

answer is B.

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Detailed Solution

To see the full image of an object in a plane mirror, the minimum length of the mirror is half the size of the object. This is so because, in reflection, the angle of incidence is equal to the angle of reflection.

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A man 1.6 m tall wishes to see his full length image in a plane mirror. The minimum length of mirror that he must buy is