What is a polaroid?

       A large sheet of synthetic material packed with tiny crystals of a dichroic substance oriented parallel to one another so that it transmits light only in one direction of the electric vector is called a polaroid.

     A thin and large sheet of synthetic material capable of producing plane polarised beams of large cross-section is called polaroid.

Example: H-Polaroids, K-Polaroids etc.

plan polarised light

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