Mention any three application of polaroids

Explanation

(1) Polaroids are used to produce and detect plane polarised light.
(2) Polaroids are used in photographic cameras to eliminate unwanted portion of light.
(3) Polaroids are used as microscope objectives to eliminate glare of light from the minute particles under observation.
Other applications :
(4) Polaroids are used in the construction of Lauretz half shade polarimeter.
(5) Polaroids are used to improve the colour contrast in the old paintings.