Discuss plane-polarised light, circularly-polarised light and elliptically-polarised light. Explain the action of plates in producing plane -polarised light.
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Plane polarized light: Light whose electric field oscillates in just one plane.
If light is composed of two plane waves of equal amplitude by differing in phase by 90°, then the light is said to be circularly polarized.
If two plane waves of differing amplitude are related in phase by 90°, or if the relative phase is other than 90° then the light is said to be elliptically polarized.
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