4 ms·
https://www.researchgate.net/post/How_does_the_plasma_sheath_affect_the_propagation_of_radio_waves https://www.researchgate.net/post/How_does_the_plasma_sheath.
by kijin 7y ago
https://www.researchgate.net/post/How_does_the_plasma_sheath_affect_the_propagation_of_radio_waves https://www.researchgate.net/post/How_does_the_plasma_sheath...
> an electromagnetic wave can penetrate the plasma if the wave frequency f is higher than the electron plasma frequency.
X-rays have a much higher frequency (i.e. much higher energy) than the radio waves we normally use for communications, so it can punch through the noise of charged particles that makes up plasma.
- eternauta3k 7y agoI believe it's not a matter of "noise". Rather, metals and plasma are conductive up to a certain frequency. Beyond that frequency, resistance goes up and the material becomes transparent. This is basically because the electrons can't "keep up" with the electric field's oscillation so they are ineffective at screening it.