question_answer

Plane polarized light is passed through a polaroid. On viewing through the polaroid we find that when the polaroid is given one complete rotation about the direction of the light, one of the following is observed  [MNR 1993]

A)            The intensity of light gradually decreases to zero and remains at zero

B)            The intensity of light gradually increases to a maximum and remains at maximum

C)            There is no change in intensity

D)            The intensity of light is twice maximum and twice zero