Calculate the number of images formed in two plane mirrors, when they are held at the angle of 72 degree.
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Explanation:
no of images formed if angle between mirror is n
360/n=y
if y is even
no of images formed=y-1
if y is odd
a)object is on the angle bisector
no of images formed=n-1
b)not on angle bisector
no of images=n
therefore in this question angle is 72,no of images formed are 5
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