A 6.0 cm layer of water (n = 1.33) is standing on a horizontalslab of glass (n = 1.50). A light ray enters the water fromair (n = 1.0) in a direction that is 50 degrees from the vertical.
a. What angle does the lightray make with the vertical while it is traveling through the water?
b. What angle does the light raymake with the vertical while it is traveling through the glass?