Q. If the focal length of the eye piece of a telescope is double, its magnifying power $m₁$ will be
A) $2m$
B) $3m$
C) $\frac{m}{2}$
D) $4m$
Explanation
(c) $m = \ - \frac{f_{0}}{f_{e}}$
$m' = \frac{m}{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.