a) If the incident angle from the air is 30 degrees and the refracted angle within the glass in 20 degrees what is the index of refraction of the glass plate?
b) What is the critical angle for light coming up through the glass towards the air?
c) What is the Brewster angle for light incident upon the glass towards the air?
d) Tha above glass plate is sitting on top of a drawing of a mermaid. IF the glass plate is 2.44 cm thick, what is the apparent depth of the mermaid?