A light ray traveling through the air impinges on diamond with an angle of incidence ?1=40.0. The diamond's bottom surface is coated with glycerine.

a) Draw the light rays, showing both a reflected and refracted ray at every interface UNLESS total internal reflection occurs. Label each ray with its angle relative to the normal.

b) Did total internal reflection occur at any interface? If so, which one or ones? Answers should be in the form of "air ? Diamond." Show your work

air . diamond glycerine