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State the types of electromagnetic polarization? Define any one of it.
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Transverse electromagnetic wave:- The polarization of a plane EM wave is simply the orientation of the electric field vector with respect to the surface (i.e. looking at the horizon) If the polarization remains constant then it is called as the linear polarization.

The linear polarization can be of two types : 1) Horizontal polarization 2)

Vertical polarization

Horizontal Polarization:- If the electric field propagates in parallel with the earth surface then EM wave is said to be horizontally polarized.

Vertical polarization:- If the electric field propagates in perpendicular to the surface of the earth then EM wave is said to be vertically polarized .

Circular polarization:- If the polarization vector rotates 3600 as the EM wave travels wavelength through the space and the filed strength is equal at all angles of polarization then the EM wave is said to have a circular polarization.

Elliptical polarization:- In the circular polarization if the field strength varies with change in polarization the wave is said to have an elliptical polarization 
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