A light ray in air enters a block of glass (of n = 1.60) at an initial angle of 65o. The length of the glass (d1) is 10.0 cm. It then immediately encounters a tank of water (n = 1.333), of length 15.0 cm, and then returns to air.
a) What is the total path length the light travels from the point it enters the glass to the point it re-enters the air?
b) What is the angle between the direction of the initially incident ray and the final ray re-entering the air?