If two plane mirrors are inclined at an angle of ${90}^{\circ }$ to each other, how many images of an object can be seen?

If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:

How many images of an object will be formed when the object is placed between two plane mirrors which are inclined at the following angles to one another?

(a) ${120}^{\circ }$ (b) ${45}^{\circ }$ (c) ${180}^{\circ }$ (d) ${60}^{\circ }$ (e) ${90}^{\circ }$

Two plane mirrors are set at right angles to each other. A coin is placed in-between these two plane mirrors. How many images of the coin will be seen?