Answer to Question #17312 in Optics for Travis Pachucki

Question

Monochromatic light enters an equilateral
prism made of glass with index of refraction
1.42 in such a way that, after refraction at the
first surface, the light travels parallel to the
base of the prism,
30
o
What must be the angle of incidence of the
light for this to occur?
Answer in units of
◦