Question

Two mirrors are inclined at an angle ${60}^{\circ }$. If an object is placed symmetrically between them, then the number of images formed will be

• A. $3$
• B. $4$
• C. $5$
• D. $6$

Answer 1

The correct option is C $5$

Given that
Inclined angle, $\theta ={60}^{\circ }$
The number of images formed by the arrangement of mirror is given by
$n=\frac{{360}^{\circ }}{\theta }$
$\Rightarrow n=\frac{{360}^{\circ }}{{60}^{\circ }}$
$\Rightarrow n=6$ ($n$ is even)
So number of images formed $\left(n_i\right)=n-1$
$\Rightarrow n_i=6-1$
$\Rightarrow n_i=5$