Q. A concave mirror of focal length $f$ (in air) is immersed in water $(\mu = 4/3)$. The focal length of the mirror in water will be
A) $f$
B) $\frac{4}{3}f$
C) $\frac{3}{4}f$
D) $\frac{7}{3}f$
Explanation
(a) Focal length of the mirror remains unchanged
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.