A ray of light is incident on a plane mirror making an angle of 90° with the mirror surface. The angle of reflection for this ray of light will be:

(a) 45°
(b) 90°
(c) 0°
(d) 60°

A ray of light is incident on a plane mirror making an angle of ${30}^{\circ }$ with the normal. The angle between reflected ray and the normal for this ray of light will be : (a) ${30}^{\circ }$ (b) ${60}^{\circ }$ (c) $0^{\circ }$ (d) ${60}^{\circ }$

An incident ray makes an angle of ${65}^{\circ }$ with the surface of a plane mirror. The angle of reflection in this case will be:

(a) ${65}^{\circ }$

(b) ${45}^{\circ }$

(c) ${25}^{\circ }$

(d) ${35}^{\circ }$

A ray of light strikes a plane mirror PQ at an angle of incidence of ${30}^{\circ }$, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is : (a) ${30}^{\circ }$ (b) ${45}^{\circ }$ (c) ${60}^{\circ }$ (d) ${90}^{\circ }$ Draw a ray-diagram to illustrate your answer.