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Question
Josh is observing his image in a plane mirror. The distance between the mirror and the image is 4 m. If his image moves 1 m towards the mirror, then what will be the distance between Josh and his image?
(a) 3 m
(b) 5 m
(c) 6 m
(d) 8 m
(a) 3 m
(b) 5 m
(c) 6 m
(d) 8 m
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Solution
(c) 6 m
The object distance is equal to the image distance in case of a plane mirror. Therefore, when Josh moved one metre towards the mirror, the image distance from the mirror will also reduce by one metre.
Therefore, the distance between Josh and his image = 3 + 3
= 6 m
The object distance is equal to the image distance in case of a plane mirror. Therefore, when Josh moved one metre towards the mirror, the image distance from the mirror will also reduce by one metre.
Therefore, the distance between Josh and his image = 3 + 3
= 6 m
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