4 ms·
A wild idea I had never even thought of, X-rays are of high enough frequncy that they can penetrate the plasmasheath of high velocity vehicles. Seemingly this i
by zeristor 7y ago
A wild idea I had never even thought of, X-rays are of high enough frequncy that they can penetrate the plasmasheath of high velocity vehicles. Seemingly this is for hypersonic transport, and rentry vehicles, my mind is quite boggled.
- amelius 7y agoWhat is the mechanism by which a plasmasheath blocks radiowaves, and why would x-rays be an exception?
- kijin 7y agohttps://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.
- nine_k 7y agoThis is similar to how a metal box blocks radio waves, and how x rays can still penetrate it.
- copperx 7y agoWhat kind of metal? I thought X-rays couldn't penetrate lead.
- dmitrygr 7y agoIt is actually pretty simple. Plasma is conductive. Most conductive things Will block radio waves at GHz and below