Question
What are circular and elliptically polarized light?

Answer

Circularly polarized light : When two plane polarized light rays are superimposed on each other under special circumstances in such a way that the resulting light vector starts rotating by a certain magnitude in a plane perpendicular to the direction of wave propagation, then the displacement of vibration in the light vector occurs in the form of a circle. Such light is called circularly polarized light. In this, the magnitude of the electric vector remains constant but its direction keeps changing regularly.

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Elliptically polarized light : When two plane polarized light rays are superimposed on each other under special circumstances in such a way that the resulting light vector starts rotating with a changed magnitude in a plane perpendicular to the direction of wave propagation, then the vibrational displacement of the light vector occurs in an ellipse. Such light is called elliptically polarized light.

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