Question

Refractive index of water in the situation shown in the figure is $\mu$. Find the distance seen by the fish F of human eye E.

• A. $H+\frac{H}{2\mu }$
• B. $\frac{3H}{2\mu }$
• C. $\frac{H}{2}+H\mu$
• D. $\frac{3\mu H}{2}$

Answer 1

The correct option is C $\frac{H}{2}+H\mu$

For fish, human eye appear to be at the position above its actual position

Apparent distance w.r.t fish $=\frac{H}{2}+\frac{H}{{}_w{\mu }_a}=\frac{H}{2}+{}_a{\mu }_{w}H=\frac{H}{2}+\mu H$