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Question

A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between the boy and his image will be:

A
8 m
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B
6 m
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C
4 m
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D
2 m
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Solution

The correct option is A 8 m
Initially, the boy is at B1. In a plane mirror, the image is the same distance behind the mirror as the object is in front of the mirror. When he moves 2 m towards the mirror, the image will shift to the position B2 as shown in the figure. Now the distance from the mirror to B2 is 4 m and the distance from the mirror toB2 is 4 m. And hence, the distance between the boy and his image becomes equal to 8 m, as evident from the figure below.


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