Question

The given ray diagram shows a ray of Iight  PQ striking a mirror AB. The mirror AB and CD are at an angle of 120^o with each other. The ray PQ strikes the surface of the mirror AB at point Q.
(i) Draw the complete path of reflection of the ray at mirrors AB and CD.
(ii) Calculate the sum of angles which the reflected rays make with the surfaces of mirrors AB and CD.

Answer 1

(i)

(ii) The sum of the angles, made by reflected rays with mirrors AB and CD is 20^o + 40^o= 60^o