A mark at the bottom of a liquid appears to rise by `0.1m`. The depth of the liquid is `1m`. The refractive index of the liquid is

Options

A. 1.33
B. 43718
C. `10/9`
D. 1.5

Answer

C

Explanation

(c ) Real depth =1 m
Apparent depth=1-0.1=0.9 m
Refractive index `mu=("Real depth")/("Apparent depth")=1/0.9=10/9`