Question

State whether True/False

Two mirrors meet at right angles. A ray of light is incident on one at an angle of ${30}^o$ as shown in fig. The reflected ray from the second mirror makes an angle of ${45}^o$ with normal.

• A. True
• B. False

Answer 1

The correct option is B False

Incident ray 1 makes an angle of incidence of ${30}^o$ with the mirror 1, thus ,the angle of reflection is also ${30}^o$. The ray 2 is reflected from mirror 1 and it acts as incident ray for the mirror 2. By geometry, we can find that angle of incidence that ray 2 makes at mirror 2 is ${60}^o$, thus, the angle of reflection is also ${60}^o$. The ray 3 is the reflected ray from the mirror 2.
Above is the diagrammatic representation.