Question

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

• A. 1.33
• B. 1/10
• C. 10/9
• D. 1.5

Answer 1

Answer: (C)

10/9

Answer 2

Dx = t $\left( 1 - \frac { 1 } { \mu } \right)$ , 0.1 = 1 $\left( 1 - \frac { 1 } { \mu } \right)$

$\frac { 1 } { \mu }$ = 1 – 0.1 = 0.9

m = $\frac { 1 } { 0.9 } = \frac { 10 } { 9 }$