question

(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-polarizedlight.

i)

ii)