Question

1. How many imagesare formed when two plane mirrors are:- a) facing each other b) inclined at an angle of 90degrees c) inclined atanangle of 60 degrees.

Answer 1

Using two plane mirrors and keeping them at an angle θ^o, number of images that can be formed is given by (360/ θ )-1.

So (a) If mirrors are kept parallel to each other then infinite no of images are formed.

(b)At an angle 90^o,

^{No of images=3}

^{(c)At an angle 60degree,}

^{no. of images=5}