Use the dispersion relation (4.10), for the transverse mode of propagation in a cold isotropic electron gas

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Use the dispersion relation (4.10), for the transverse mode of propagation in a cold isotropic electron gas (with B0 = 0), to calculate the damping factor α = I{k}. Show that, when ω ≫ ωpe, the damping factor is given approximately by

Equation.

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