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 usual height?

Question

Philoid · Accepted Answer

we know that,

But, here first surface is air, so and also, surface is not at all curved. So, .

So, formula reduced to,

So,

Here we know, of water. So, . Hence he will seem taller.