Question

a point source of light S is placed at a distance of 10cm in front of the centre of a mirror of with 20cm suspended vertically on a wall a man walks with a speed 10 centimetre per second in front of the mirror along a line parallel to the mirror at a distance 20cm front in it is shown in the figure find the maximum time during which he can see the image of the source as in the mirror​

Answer 1

Answer:

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