If light enters an equilateral glass prism (n = 1.40) with an angle of incidence of 45 degree, what is the angle of refraction as the beam emerges from the prism? Note that an equilateral triangle has three 60° angles.

If light enters an equilateral glass prism (n = 1.40) with an angle of

1.	If light enters an equilateral glass prism (n = 1.40) with an angle of incidence of 45 degree, what is the angle of refraction as the beam emerges from the prism? Note that an equilateral triangle has three 60° angles.
A.	67.2°
B.	52.4°
C.	43.5°
D.	60°
Answer» C. 43.5°