Question

A vertically polarized beam of light with an intensity lo is incident on a polarizing filter. The transmission axis of the filter is initially vertical, as shown in the figure. polarizing filter with transmission axis vertical, originally vertically polarized incident beam Keeping the polarizing filter perpendicular to the direction of the incident light at all times, the polarizing filter is rotated a full rotation (360°). Graph 2 Graph 1 A + + + t t 180° 360° o 180° 360° Graph 4 / Graph 3 180 360° 360° Graph 6 Graph 5 180° 360° 180 360°

Answer 1

Part-a :- according to the condition given in question, since the intensity of light transmitted by the polasizes, when a light of intensity lo is incident, is gien by i = lo cos? Coe) Where Do = angle between the transmission axis of the light. since, the light is to be Vertically polarized When the transmission

axis is aligned to zero degrees , the angle of the transmission axis is nothing but se graph of cost which is graph 6] is the codšect answer. Part - B:- The intensity of light transmitted through a polarizer is equal to half of the intensity of the incident unpolarized light, iszesportive of the alignment of transmission axis, of the polarizer. so the Graph - 2 is the answer