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## Homework Statement

There's a block of glass and it has a refractive index n = 1.5 and it is put in water.

Randomly polarized light is incident from the water towards the glass at an angle of 53 degrees to the normal.

a) what % p-polarized (part) of the em wave (light) is reflected off the glass? and the % of total incident power of the light is transmitted in the block?

## Homework Equations

so my solution I guess is

## The Attempt at a Solution

R% (reflectance) = Pr^2/Pi

Hence then if you find Pr , using Pr equation, and Pi but I don't know... how to find those

do I have to derive them?