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. Two plane mirrors are inclined at ${70}^o$. A ray incident on one mirror at angle $\theta$, after reflection falls on second mirror and is reflected from there parallel to first mirror. The value of $\theta$ :

Q. Two plane mirrors are inclined at ${70}^{\circ }.$ A ray incident on one mirror at incidence angle $\theta$ , after reflection falls on the second mirror and is reflected from there parallel to the first mirror. The value of $\theta$ is

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 :

Q. Two plane mirror A and B are inclined at angle $\theta (<{90}^o)$ to each other. A light ray parallel to mirror B is incident on mirror A and it becomes parallel to mirror A after reflection from mirror B. Find the value of angle $\theta$.

Q. Two plane mirror A and B are oriented perpendicular to each other. A light ray incident at angle $\theta$ on mirror A is also reflected by the mirror B. If the reflected ray from mirror B is parallel to the incident ray on A, such that the ray reflected from the first mirror as the same angle of incidence on the second mirror then find the value of $\theta$.