Given, refractive index of glass, µ=1.4 When the light beam incident of polarizing angle i.e at i=ip, then refracted and reflected rays are perpendicular to each other. Hence, according to Brewster's law ‌µ=tan‌ip ‌⇒‌‌ip=tan−1(µ)=tan−1(1.4) ‌∴‌ Angle of incidence ‌ ‌i=ip=tan−1(1.4) ‌
