Question

the Brewster angle for a certain media boundary is 33°. what is th me critical angle for total internal reflection for the same boundary?

Answer 1

We're given the Brewster angle

Using the formula for the relation between critical angle and the refractive indices of the two media and

Putting in the above gives us

This means the first medium is optically denser than the second.

Then using the relation between critical angle   and the refractive indices as

where is the rarer medium and is the optically denser medium.

for our case.

So the critical angle is