- #1

- 10

- 0

## Homework Statement

The critical angle for a special glass in air is 44 degrees. What is the critical angle if the glass is immersed in water?

## Homework Equations

sin(critical angle) = 1/index of refraction

index of refraction of air is 1.00

index of refraction of water is 1.333

## The Attempt at a Solution

I have no clue where to start that's the problem :S.

Just for reference, the textbook answer is 68 degrees.

Thanks.