Tue November 13, 2012 By: Divyadutta Behura

how far should an object be placed from the pole of a concave mirror of focal length 20cm to form a real image whose size is 1/5th of the size of the object.

Expert Reply
Wed November 14, 2012
m=-1/5=-v/u     u=? v=u/5 , f=-20 cm
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