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Accelerated electric charge

  1. Aug 18, 2005 #1
    why does an accelerated electric charge produce energy?
  2. jcsd
  3. Aug 18, 2005 #2


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    Do you mean why does an accelerated charge radiate?
  4. Aug 18, 2005 #3
    yes, you're right~
  5. Aug 18, 2005 #4

    Meir Achuz

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    This can only be seen in a detailed derivation of the radiation E and B fields.
    See almost any intermediate or higher EM text.
    The key point is that, for raditation, E and B fall off like 1/r instead of 1/r^2.
    This follows from the use of the retarded time.
    It turns out that if the velocity is constant, the retarded time does not result in the 1/r dependence.
  6. Aug 19, 2005 #5
    thanks! :)
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