Q. A biconvex lens with equal radii curvature has refractive index 1.6 and focal length $10\ cm$. Its radius of curvature will be
A) 20 $cm$
B) 16 $cm$
C) 10 $cm$
D) 12 $cm$
Explanation
(d) $f = \frac{R}{2(\mu - 1)} \Rightarrow 10 = \frac{R}{2(1.6 - 1)} \Rightarrow R = 12\ cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.