Q. Focal length of a plane mirror is
A) Zero
B) Infinite
C) Very less
D) Indefinite
Explanation
(b) $f = \frac{R}{2}$ and $R = \infty$ for plane mirror
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.