Question

What is Brewster's angle for an air-glass n = 1.58 surface

Answer 1

n₂ = index of refraction of glass = 1.58

n₁ = index of refraction of air = 1

θ = Brewster's angle

Brewster's angle is that incident angle at which the the reflected light from the interface of two medium is completely polarized.

Brewster's angle is given as

θ = tan⁻¹(n₂ /n₁ )

θ = tan⁻¹(1.58/1 )

θ = 57.7 deg

hence the Brewster's angle comes out to be 57.7 deg