Applications
Polarizing sheets are used in liquid crystal displays, optical microscopes and sunglasses. Since Polaroid sheet is dichroic, it will absorb impinging light of one plane of polarisation, so sunglasses will reduce the partially polarised light reflected from level surfaces such as windows and sheets of water, for example. They are also used to examine for chain orientation in transparent plastic products made from polystyrene or polycarbonate.
The intensity of light passing through a Polaroid polariser is described by Malus' law.
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