Critical Angle (9, 2)

Equation:

n1 SIN(θ c) = -----

n2

Example:

Given: n1=1, n2=1.5.

Solution: θc=41.8103_°.

Brewster’s Law (9, 3)

The Brewster angle is the angle of incidence at which the reflected wave is completely polarized.

Equations:

n2

θ B + θ 2 = 90

TANB) = -----

n1

 

Example:

Given: n1=1, n2=1.5.

Solution: θ B=56.3099_°, θ 2=33.6901_°.

5-38 Equation Reference