Question

A light wave strikes a lake at an angle of incidence of 65.4 degrees. At what angle of refraction will this wave travel through the lake? (The index of refraction of water is 1.33 and the index of refraction of air is 1.00)

Answer 1

If you are measuring the angles from the surface normal, then it will be bent towards the normal.

1*sin65.4=1.33sinT
sinT=3/4 * sin(65degrees)
T=arcsin( )=42.8 degrees