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Free electron model

  1. Aug 2, 2010 #1

    i would like to know why do we use the term free electron gas instead of Plasma?
    aren't both the same?

  2. jcsd
  3. Aug 2, 2010 #2
    While free electron model specifically deals with electrons, a plasma generally consists of both electrons and positively ionized atoms.
  4. Aug 2, 2010 #3


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    They are not the same. The free electron model assumes that interactions between the electrons are negligible and hence completely neglected. In a plasma the interactions between the electrically charged elements are very strong. Perhaps some models of plasmas may be equivalent to the free electron model, in a mean-field kind of approximation, but more sophisticated models will be very different from the free electron model.
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