

Explanation
Polarizer is an optical device which allows vibrations of light to pass throagh in only one phone perpendicular to the direalioniof propagation
(b)

Unpolarized Polarizer Polarized l light ight Unpolarized light vibrates in all directions and a polarized is used to block all vibrations, and transmits only light vibrations polarized in one plane perpendicular to the direction of propagation.

