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Question
A boy is standing in front of a plane mirror at a distance of 3 m from it.
(i) What is the distance between the boy and his image?
(ii) If the boy moves 1 m backward, find the distance between the image and the boy.
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Solution
Given, a distance of boy from the mirror = 3 m
(a). The distance of the image from mirror = distance of boy from the mirror = 3 m
Distance between a boy and his image = distance of boy from the mirror + distance of the image from mirror = 3+3 = 6 m
(b). Now, a distance of boy from the mirror = 4 m
The distance of the image from mirror = 4 m
Distance between a boy and his image = distance of boy from the mirror + distance of the image from mirror = 4+4 = 8 m.
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