Are static E fields non existant?

  • Thread starter azaharak
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  • #1
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Since electrons can never be at rest because they have some non zero temperature,

Isn't the static E field that one would perceive in a capacitor just an averaging of all the E fields creates by electrons in motion on either side of the capcitor plates.

If this is so, since the electrons are in motion, they are emitting EM radiation (light, or photons)

Does that mean that Static E fields are really just averaging of photonic electric fields created by the electron?

(like a fourier series of various frequencies added together to produce a constant or static field).
 

Answers and Replies

  • #2
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Essentially yes. Pretty much anything classical that appears static is a result of the averaging out of quantum effects.
 
  • #3
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Thanks..


Is that why a "static" field can ionize an electron, but low energy EM radiation (low frequency) can not ionize an electron from its host atom?


Thanks again


AZ
 
  • #4
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Anyone?
 
  • #5
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Thanks..


Is that why a "static" field can ionize an electron, but low energy EM radiation (low frequency) can not ionize an electron from its host atom?


Thanks again


AZ
This seems to contradict Keldysh theory, which states that even low frequency radiation can produce ionization if the intensity is high enough?

Seems the contradict the photoelectric experiment, but not really i guess.

Can anyone give a good description of all of this? I don't feel like they all go together.


Keldysh theory (states that multi absoprtion of photons can cause ionization) high intensity low frequency radiation (that normally provides less energy than the work function per photon) can still ionize an electron.

Static E fields are an average or superposition of radiation produced by electrons in thermal motion, their radiation allows for what would be called the classical energy gained by an electron in a static field?

Photo electric effect deals that energy is absorbed in quanta, increasing frequency above work function results in freeing electrons rather than increasing intensity.

If high intensity low radiation can still ionize, doesn't this cause cancer scares for power lines or high intensity microwave generators?


THANKS!
 
  • #6
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Any physics genie s out there?
 
  • #7
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Anyone?
 

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