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

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