Quote:
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Originally Posted by lyndonashmore
Quote:
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Originally Posted by papageno
At length-scales much larger than the average distance between particles, one sees a density of charges, not single charge carriers.
The density is nearly unifrom, because of the relatively high speed and random motion of the electrons.
An electromagnetic wave with a wavelength comparable to these length-scales, does not interact with one electron at a time, but with a high number of electrons at the same time.
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And what do these electrons do when the wave interacts with them?
I mean how do they move? |
At those length-scales, talking about motions of single electrons is not very helpful, which is why you always find the charge density in your sources.
If you treat the electromagnetic wave as a macroscopic oscillating electric field, the single electron is accelerated.
If you treat it as a collection of photons, you have lots of electron scattering lots of photons.
(An electron oscillates in a high-power laser light, because it is scattering a lot of photons: for each photon it recoils, and adding up all the recoils, you end up with an oscillation. This is Feynman's picture in his
QED book, as far as I understand.)
But in your "theory" you try to explain the red-shift as a sum of single-electron/single-photon scattering, which is not the same as macroscopic electormagnetic waves and plasma oscillations.