What is polarizer and analyzer?

What is polarizer and analyzer?
Ans: A polarizer is a substance which is used in cutting the vibration of light radiation in one plane to produce polarized light while analyzer is a substance that detects whether the light is polarized or not.


 What happens to the intensity of light, when it is polarized?
Ans: When the light is polarized, the vibration of electric vector is allowed in only one plane. The vibration to other plane is restricted. So, the intensity of the light gets decreased.