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In electrodynamics, linear polarization or plane polarization of electromagnetic radiation is a confinement of the electric field vector or magnetic field vector to a given plane along the direction of propagation.
The most common source of polarized light is a laser. Depending on how the electric field is oriented, we classify polarized light into three types of polarizations: Linear polarization: the electric field of light is confined to a single plane along the direction of propagation (Figure 1).
Light is linearly polarized (sometimes called plane polarized) when the electric field oscillates on a straight line; Fig. 33–1 illustrates linear polarization. When the end of the electric field vector travels in an ellipse, the light is elliptically polarized.
Linearly polarized light generally has its polarization state altered upon transmission through such a crystal, making it stand out when viewed in between two crossed polarizers, as seen in the photograph, above.
Polarization is the attribute that a wave’s oscillations have a definite direction relative to the direction of propagation of the wave. (This is not the same type of polarization as that discussed for the separation of charges.) Waves having such a direction are said to be polarized.
Elliptically and Circularly Polarized Light. In linearly polarized light, the electric vector is vibrating in a plane that is perpendicular to the direction of propagation, as discussed above.
Learn about the different types of polarization of electromagnetic waves, such as linear, circular, and elliptical. See how the electric and magnetic fields are related and how they vary in space and time.
