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Polarized light



Light in which electromagnetic vibrations oscillate repeatedly in only one direction perpendicular to the direction of propagation.


Light polarization is a property of light waves that depicts the direction of their oscillations. A polarized light vibrates or oscillates in only one direction. This is in contrast to a nonpolarized light that vibrates in many directions. A polarized light may be plane-polarized, circularly polarized or elliptical-polarized light based on the net direction of the vibrations.

Many animals are able to perceive and use certain forms of polarized light. For instance, insects use plane-polarized light for navigational purposes. A naked human eye is not very sensitive to polarized light but with practice, or with the use of a polarizer, humans can then perceive a polarized light such as the Haidinger's brush phenomenon.

Compare: nonpolarized light

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