Question

suppose you are inside the water in a
Swimming pool near an edge. A
friend is standing on the edge . Do
you find your friend taller or shorter
than his actual height? why?​

Answer 1

Answer:

the height should be smaller than actual

Answer 2

your friend looks shorter because

As light travelling from denser medium to rarer medium it bends away from the normal due to refraction and vice versa

And let x be the actual height of my friend, then,

​  refractive index of air$\frac{refractive index of air}{Refractive index of water}$ = $\frac{Actual height of my friend}{Apparent height of my friend}$

1/4 × 3 = $\frac{x}{Apparent height of my friend}$

Apparent height of my friend = 3/4 × actual height of my friend