a girl with a face 50cm wide. stand from a plane mirror wide stand 2m from plane mirror where is her image formed how wide is the image of her image of her face if she walk toward at 2m/s at what spee does her image approch her
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Explanation:
in a plane mirror distance of object from mirror is equal to distance of image from mirror
image is at a distance of 2m
since the magnification of plane mirror is 1 the image of the face is of same width as the face which is 20cm
if she runs towards mirror at speed of 2m/s her image also moves towards mirror with speed of 2m/s
relative velocity of image with respect to the girl=2-(-2)=2+2=4m/s
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