Question

When two plane mirror are placed perpendicular to each oher then total number of images formed are -​

Answer 1

Explanation:

3 images

When two plane mirrors are kept perpendicular to each other as shown (O is the point object), 3 images will be formed

Answer 2

Explanation:

If θ be the angle between 2 mirrors, then the number of images formed will be, 

m=θ2π−1

Thus, if θ=90

then m=3

Also, in case of multiple reflections first image of an object acts as an object for the second image.

Therefore 3 images will be formed.