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Image Formation in Plane Mirrors

A boy with mo...

Question

A boy with mouth 5 m wide stand to 2 m away from a plane mirror where is his image and how wide is the image of his mouth

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Solution

The image will be formed behind the mirror at a distance of 2m from the mirror. The mouth will be 5m wide.

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Q. (a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth?
(b) The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him?

Q. A boy stands straight in front of a mirror at a distance

30 c m

away from it. He sees his erect image whose height is

{(\frac{1}{5})}^{t h}

of his real height. The mirror he is using is :

A boy stands straight in front of a mirror at a distance of 30cm away from it.

He sees his erect image whose height is of his real height. The mirror he is using is

[MP PMT 1993]

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