The other special case is the easier-to-understand linear polarization. A circularly polarized wave can rotate in one of two possible senses: right-handed circular polarization (RHCP) in which the electric field vector rotates in a right-hand sense with respect to the direction of propagation, and left-handed circular polarization (LHCP) in which the vector rotates in a left-hand sense.Ĭircular polarization is a limiting case of elliptical polarization. At any instant of time, the electric field vector of the wave indicates a point on a helix oriented along the direction of propagation. In the case of a circularly polarized wave, the tip of the electric field vector, at a given point in space, relates to the phase of the light as it travels through time and space. In electrodynamics, the strength and direction of an electric field is defined by its electric field vector. In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electromagnetic field of the wave has a constant magnitude and is rotating at a constant rate in a plane perpendicular to the direction of the wave. This wave is right-handed/clockwise circularly polarized as defined from the point of view of the source, or left-handed/anti-clockwise circularly polarized if defined from the point of view of the receiver. Polarization state The electric field vectors of a traveling circularly polarized electromagnetic wave.
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