Question

Two plane mirrors are placed at 450

to each other if an object is placed between then

the number of images will be ....​

Answer 1

Answer:

7 images

Explanation:

The formula for number of images formed by two plane mirrors placed at certain angle is (360/n).[where n=angle between the mirrors]

The most important thing to remember is that, every time the number of images formed are only ODD numbers. (for the reason of odd number formation, refer textbooks like hc verma)

if the result is even then you need to subtract 1 from that.

if it is odd u need not subtract , since the number of images ever formed are only odd.

so for the angle 45 degrees the number of images formed are:

360/45

=8

in this case, since the images formed are even u need to subtract 1 from it i.e

8–1

=7

so the number of images formed are 7.