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Magnetic field of an electron and general relativity

  1. Apr 17, 2013 #1
    This is from an older thread:

    If that's true, how does the electron's spin cause it to behave like a small bar magnet? Why does relativity demand an electron have a magnetic field?

  2. jcsd
  3. Apr 17, 2013 #2


    Staff: Mentor

    I am not sure what you mean. It is Maxwell's equations which demand that a moving electron has a magnetic field.

    Relativity just provides a transformation that preserves Maxwell's equations in different reference frames. Before relativity was developed it was believed that Maxwell's equations only held exactly in one reference frame, but in that frame (without relativity) a moving electron would still have a magnetic field.
  4. Apr 19, 2013 #3
    Perhaps this important paper will shed some light on the subject :

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