Q. A mark at the bottom of a liquid appears to rise by $0.1\ m.$ The depth of the liquid is $1\ m$. The refractive index of the liquid is
A) 1.33
B) $\frac{9}{10}$
C) $\frac{10}{9}$
D) 1.5
Explanation
(c) Real depth $= 1\ m$
Apparent depth $= 1 - 0.1 = 0.9\ m$
Refractive index $\mu = \frac{Real\ depth}{Apparent\ depth} = \frac{1}{0.9} = \frac{10}{9}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.