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Accelerating charge emits em waves or pulse

  1. Jan 9, 2016 #1
    Does an accelerating charge, such as one turning a corner emit an em wave or just a pulse? Classical logic dictates it should just be a pulse as there is no oscillation. But which is it?
     
  2. jcsd
  3. Jan 9, 2016 #2
    Let me be more specific. An electron in a magnetic field, not synchotron radiation as this is a spiralling electron
     
  4. Jan 9, 2016 #3

    Dale

    Staff: Mentor

  5. Jan 9, 2016 #4
    Sry but I don't understand all those hyroglifics. Just intuitively is a free electron similar to an antenna, where I assume a half wavelength pulse can be created or is it a different case
     
  6. Jan 9, 2016 #5

    Dale

    Staff: Mentor

    Then in the future please mark your threads as "B" instead of "I". The math in that link is standard vector calculus from undergraduate level physics.

    I have updated this thread for you.
     
  7. Jan 9, 2016 #6

    Dale

    Staff: Mentor

  8. Jan 9, 2016 #7

    blue_leaf77

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    Science Advisor
    Homework Helper

    Taking the case of wiggler radiation as an analogy to the kind of motion you are considering, a Wiki link (https://en.wikipedia.org/wiki/Wiggler_(synchrotron)) says "A wiggler has a broader spectrum of radiation than an undulator". This suggests that the radiation is indeed confined in time, or is commonly referred as a pulse. By the way, light pulse does not necessarily implies that the pulse length is short enough such that one cycle of the carrier frequency cannot be covered. A pulse is usually described as an oscillation under a localized envelope.
     
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