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Polarization
The polarization density P is the vector field that expresses the density of permanent or induced electric dipole moments in a dielectric material.
Explanation
It is a vector quantity that plays a role in electromagnetic field theory and thus also in the Maxwell equations.
Example 1
Polarization occurs in the Maxwell equation of the electric field strength
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where
E Electric field strength ε0 Electric field constant D Electric displacement P Polarization
HistoryThis concept was introduced by the British physicist Michael Faraday （1791 - 1867） while studying the behaviour of electrical insulators in electrostatic fields. |