Which of the following statement is correct?

Options

A. if two polariods are placed at `90^(@)` to each other then , the transmitted intensity is zero.
B. if two polariods are placed at `90^(@)` to each other and one more polaroid is placed between these two (bisecting the angle between them), then intensity of light will be half.
C. polarized light has angle of electric field along the propagation of light.
D. All of them

Answer

A

Explanation

No part of light is transmitted through to polaroids kept at `90^(@)` to each other. If one more polaroid is inserted between the two then, first polaroid will rotate the light by `90^(@)` second polaroid which is kept `45^(@)` angle with the first polaroid will rotate it again by `90^(@)` polarized light has angle of electric field perpendicular to the direction of motion.