In cgs, the electric susceptibility is defined as the ratio of polarization P to electric field strength E,
where
is the electric permittivity (Purcell 1985, p. 372).
In MKS, the electric susceptibility is defined as
where
is the permittivity of free space (Griffiths 1998, p. 156)
(1)
where
is the electric permittivity (Purcell 1985, p. 372).In MKS, the electric susceptibility is defined as
(2)
where
is the permittivity of free space (Griffiths 1998, p. 156)
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