If angle between two plane mirrors is 120 degrees then how many images were formed

Question

asked Aug 20, 2020 142k views

1 Answer

Aschab · Answer 1 · 2020-08-25T04:06:44+0000

Step-by-step explanation:

The number of images formed by a pair mirrors kept at an angle
$\alpha$ is

$n=(360)/(\alpha ) -1$ if
$(360)/(\alpha )$ comes even.

$n=(360)/(\alpha )$ if
$(360)/(\alpha )$ comes odd.

where
is the number of images formed.

In our question,

$\alpha =120^(0)$

$(360)/(\alpha ) =(360)/(120)=3$

It is odd,so
n=(360)/(120)=3