A ray of light is incident on the surface of a glass plate of refractive index ( 3 ) at the polarising angle. The angle of refraction of the ray is

Step-by-step solution

Given, refractive index of glass plate, ( = 3 ) Polarising angle ( ) of incident light is given as, ( = ) or ( 3 = or = ⁻¹( 3 ) ) ( ) angle of incident, ( =60^ ) ([ 60= 3 ] ) refractive index is given as, ( = i r ) or ( 3 r= 60^ [ i= =60^ ] ) or ( 3 r= 3 2 or r= 1 2 ) or (r= ⁻¹ ( 1 2 ) r=30^ ) Thus, the angle of refraction of the ray is (30^ ).