Q. Two plane mirrors inclined to each other at an angle $72{^\circ},$ what is the number of image formed?
A) 3
B) 5
C) 9
D) 7
Explanation
(b) Number of images formed
$= \frac{360{^\circ}}{\theta}$
$= \ \frac{360{^\circ}}{72} = 5$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.