If an object is held at a distance of 60 centimeters from a convex mirror of focal length 20 CM at what distance from the mirror should a plane mirror be held so that images in the two Mirrors coincide
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1/v -1/u= 1/f
1/v-1/-60 = 1/20
1/v= 1/20 -1/60
1/v= 3-1/60
v =30
1/v-1/-60 = 1/20
1/v= 1/20 -1/60
1/v= 3-1/60
v =30
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