Question

A pond of depth $20cm$ is half filled with an oil of $\mu =1.4$ and the other half is filled with water of refractive index $1.33$. Calculate apparent depth of the tank when viewed normally.

• A. 14.66
• B. 17
• C. 18
• D. 20

Answer 1

The correct option is A 14.66

Given,

${\mu }_1=1.33$, $d_1=10cm$

${\mu }_2=1.4$, $d_2=10cm$

The apparent depth, $d_p=\frac{d_1}{{\mu }_1}+\frac{d_2}{{\mu }_2}$

$d_p=\frac{10}{1.33}+\frac{10}{1.4}$

$d_p=14.66cm$

The correct option is A.