How would I figure out the answer to this question?

A critical angle of 24.4 degrees applies to:
a) light travelling from air into diamond
b) light travelling from diamond into air
c) light travelling from water into diamond
d) light travelling from diamond into water

Question

How would I figure out the answer to this question?

A critical angle of 24.4 degrees applies to:
a) light travelling from air into diamond 
b) light travelling from diamond into air
c) light travelling from water into diamond
d) light travelling from diamond into water

amilapsn · Answer

for this you need to know the concept of critical angle as well as an idea of the coefficient of refraction for diamond.

amilapsn · Answer

@hihellohi ok?

anonymous · Answer

Oh I think I got it. So would it be b) diamond into air?

nincompoop · Answer

nope. read your physics book