An Oil Film Floats on a Water Surface $\degree$ With the Normal,what Is the Incident Angle at the Oil-To-Water

Multiple Choice

An oil film floats on a water surface.The indices of refraction for water and oil,respectively,are 1.333 and 1.466.If a ray of light is incident on the air-to-oil surface at an angle of 37.0 $\degree$ with the normal,what is the incident angle at the oil-to-water surface?

A) 18.1 $\degree$
B) 24.2 $\degree$
C) 27.3 $\degree$
D) 37.0 $\degree$