Q. Which mirror is to be used to obtain a parallel beam of light from a small lamp?
A) Plane mirror
B) Convex mirror
C) Concave mirror
D) Any one of these
Explanation
(c) It lamp is placed at the focus of concave mirror then we get parallel beam of light.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.