Question

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

Answer 1

The number of images formed when two mirrors are placed at an angle theta to each other is given by:

n = ( 360 / theta ) - 1

So, here, we have the mirrors placed perpendicular to each other. So, theta = 90 degree

=> n = no. of images formed

=> n = ( 360 / 90 ) - 1

=> n = 4 - 1

=> n = 3

Answer 2

Given:

2 plane mirror are set at right angles to each other

To Find:

Number of images of coin that will be seen.

Explanation:

n = ( 360° / θ ) - 1

Here we have the mirrors placed perpendicular to each other.

So,θ = 90°

n = number of images formed (n)

n = ( 360° / 90° ) - 1

n = 4 - 1

n = 3

3 images will be formed.