Question: An ionized gas or plasma is a dispersive medium for EM waves. Given that the dispersion equation is where Ï p is the constant plasma

An ionized gas or plasma is a dispersive medium for EM waves. Given that the dispersion equation is

o² = w, + c²k? @p

where ωp is the constant plasma frequency, determine expressions for both the phase and group velocities and show that vvg = c2.

o = w, + ck? @p

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