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Name: Animesh
Status: student
Grade: 9-12
Location: IN
Country: India
Date: Winter 2011-2012

I read that if two abutting plane mirrors are inclined at an angle (theta) then the number of images formed is given by the formula : n = (360/theta)-1 , where n = the number of images formed. I wanted to know that how this formula has been derived .


The person who derived the equation probably had two mirrors and ran multiple cases recording the angle of the mirrors and the number of images and then derived the mathematical relationship between n and theta.

Sincere regards, Mike Stewart

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