Polarizability

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polarizability

The proportionality factor between the dipole moment (usually electric but also magnetic) induced in an atom, molecule, or even a particle and the inducing electric or magnetic field.

If the induced electric dipole moment is p,
ams2001glos-Pe26
where E is the electric field and α the electric polarizability. In general, α is a tensor (because p and E are not necessarily parallel) and depends on the frequency of the (periodic) field E.

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