The number of images formed for
a combination of plane mirrors depends on the angle between
the mirrors. If q be the angle between the two mirrors, then
the number of images formed is given by,
No. of images, n= 360/q -1
Only the whole number part of n is taken. Further, if n is
even then, n = n-1. That is only odd number of images are
For example, if for some value of q, n = 6.2, then n=5.
How do these images form? check out the animation.