Question

how will you obtain multiple images using two plane mirrors​

Answer 1

By placing the two mirrors parallel to each other in such a way that infinite images are formed.

Answer 2

If two plane mirrors are placed together on one of their edges so as to form a right angle mirror system and then the angle between them is decreased, some interesting observations can be made. One observes that as the angle between the mirrors decreases, the number of images that can be seen increases.