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