A Ray of Light Travels Across a Liquid-To-Glass Interface $\degree$ B)522 $\degree$

Multiple Choice

A ray of light travels across a liquid-to-glass interface.If the indices of refraction for the liquid and glass are,respectively,1.75 and 1.52,what is the critical angle at this interface?

A) 30.0 $\degree$
B) 52.2 $\degree$
C) 60.3 $\degree$
D) Critical angle does not exist.