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→Polarization
===Polarization ===
Polarization is very easily visualised as pattern traced out by the E-field in any electromagnetic wave.
[[File:Polarization1Polarization4.pnggif|center|frame|Image reproduced from [https://commons.wikimedia.org/wiki/File:EM-Wave_noGIF.svg here]]]
For example in the the above figure, when only E-field component of the electromagnetic wave is traced out on screen perpendicular to the direction of propagation of the electromagnetic wave, we get a straight line. Hence the polarization of this kind of electromagnetic wave is called linear. <br \>
Based on polarization there are three major types of waves:
