When two plane mirrors are parallel to each other, the angle between them is degrees.

Q. When two plane mirrors are parallel to each other, the angle between them is degrees.

Q.

In a barber's shop, two plane mirrors are placed :

(a) perpendicular to each other

(b) parallel to each other

(c) at an angle of ${60}^{\circ }$ between them

(d) at an angle of ${45}^{\circ }$ between them.

Q. There are two plane mirrors placed at some angle $\theta$ with each other. A ray incident on first mirror (travelling parallel to second mirror) , travels parallel to the first mirror after two successive reflections. Find the angle $\theta$ between the mirrors.

Q.

The plane mirrors $M_1$ and $M_2$ are inclined to each other such that a ray of light incident on mirror $M_1$ and parallel to the mirror $M_2$ is reflected from mirror $M_2$ parallel to the mirror $M_1$. The angle between the two mirror is (in degrees)

Q. Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror $\left(M_1\right)$ and parallel to the second mirror $\left(M_2\right)$ is finally reflected from the second mirror $\left(M_2\right)$ parallel to the first mirror $\left(M_1\right)$. The angle between the two mirrors will be :