Q. Two vertical plane mirrors are inclined at an angle of $60{^\circ}$ with each other. A ray of light travelling horizontally is reflected first from one mirror and then from the other. The resultant deviation is
A) $60{^\circ}$
B) $120{^\circ}$
C) $180{^\circ}$
D) $240{^\circ}$
Explanation
(d) $\delta = (360 - 2\theta) = (360 - 2 \times 60) = 240{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.