Homework #3 Rays, Refllection, Index of Refraction
Equations:

Please answer all questions completely. If calculations are required, show enough steps so that I can follow your reasoning.

1. Define:

a) light ray

b) rectilinear propagation

c) normal line

d) specular reflection

e) diffuse reflection

f) index of refraction

2. Two mirrors meet so that the angle between them is 60o. A ray of light is incident on the first mirror at an angle of 45o as shown in the figure. What is

a) the angle of reflection at the first mirror

b) the angle of incidence at the second mirror

c) the angle of reflection at the second mirror

(Hint: the interior angles of a triangle sum to 180 degrees) Be sure to make a careful diagram!