The Brewsters angle i b for an interface should be

Step-by-step solution

Brewster's angle is defined as the angle of incidence at which the reflection of particular polarized light is zero, and it perfectly transmitted through a transparent surface. Brewster's angle( i b ) is given by, tan i b = μ 2 μ 1 = μ 2 1 , where μ 2 is the refractive index of the dielectric and μ 1 is the refractive index of air. We know that, μ 2 > 1 . (refractive index of any dielectric will be greater than refractive index of air.) ⇒ ∞ < tan i b > 1