Question

12.
Two mirrors A and B are placed at angle 80° to each other as shown
80°
40°
A ray of light incident on mirror A at angle of 40° falls on mirror B after reflection. The angle of
reflection for the ray reflected from mirror B would be
by 40°
(c) 45°
(d) 90°
(a) 30°​

Answer 1

Answer:

40°

Explanation:

On plotting the ray , we get by geometry the angle of reflection for the ray reflected from mirror B = 40°

Answer 2

Answer:

40°

Explanation:

because the angle of incidence and the angle of reflection are equal and when the reflected ray strikes the mirror B the angle of reflection of B becomes the corresponding angle of the angle of reflection of A and thus are equal. (because corresponding angles are equal).