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Mirror Formula

Suppose a boy...

Question

Suppose a boy is standing in front of a plane mirror at a distance of 10m. Now he moves 5m towards the mirror. Distance between his initial and final image is
A) 10m
B) 5m
C)15m
D)20m

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Solution

Hello!
As the boy stands at a distance of 10m first, the initial image is 10m behind the mirror.
When the boy moves a distance of 5m towards the mirror, he is actually 5m away from the mirror. So now the final image is formed 5m behind the mirror.
Thus, the distance between his initial and final image is 5m.

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