(a) What is meant by plane polarised light ? An unpolarised light is incident at an angle on the surface of glass of refractive index . If the reflected and refracted rays are perpendicular to each other, then obtain the relationship between and .
(b) Two polaroids and are placed in a crossed position. Unpolarised light of intensity is incident on . If is rotated through an angle about the direction of propagation of light, keeping fixed, plot the graph of intensity of light for which is (i) transmitted by , and (ii) transmitted by .
(a)if the electric vector is confined to one particular plane, containing the direction of propagation it is referred to as plane-polarized light.
i)
ii)