Can a monochromatic plane EM wave exists in a plasma when [tex]\omega [/tex] is less than [tex]\omega_p[/tex] (the plasma frequency)? If so, is it attenuated?(adsbygoogle = window.adsbygoogle || []).push({});

I read in a text that a wave incident on a plasma with [tex]\omega < \omega_p[/tex] is completely reflected, but does this mean such a wave can't exist in a plasma?

If [tex] \omega > \omega_p[/tex], is the (time averaged) power radiated just the same as a plane wave in vacuum ?

I get [tex] \mathbb{S} = \frac{cE^2}{8\pi \omega}\sqrt{\omega^2 - \omega_p^2}\textbf{z}[/tex] for omega > omega_p.

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# EM wave in plasma

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