Question

If two plane mirrors are placed perpendicular to each other and an object is placed in front of this arrangement THEN HOW MANY IMAGES WILL BE FORMED?

Answer 1

Numbers of images formed will be

n = (360 / angle between two mirrors) - 1

so, the angle between two mirrors = 90 deg., then

n = (360/90) - 1 = 4 - 1 = 3 images