If we define an effective collision frequency ef () such that the longitudinal electric conductivity is
Question:
If we define an effective collision frequency νef(ω) such that the longitudinal electric conductivity is given by
then, by comparison with (2.18), we find that
(a) Show that in the low-frequency limit (ω ≪ νef) we have
(b) Show that in the high-frequency limit (ω ≫ νef) we have
Thus, in both limits νef is independent of ω.
Equation.
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