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(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? |
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Answer» (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? |
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