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B Question on classical electron radius

  1. Jan 2, 2018 #1
    Hi at everyone, why on wiki there is written:
    " According to modern understanding, the electron is a point particle with a point charge and no spatial extent. Attempts to model the electron as a non-point particle are considered ill-conceived and counter-pedagogic "
    I don't understand this that mean..
  2. jcsd
  3. Jan 2, 2018 #2
    It means it has 0 size in terms of volume, it's treated as a point, like a point on a graph. Whether or not that is actually true is unknown.
  4. Jan 2, 2018 #3
    What is known for sure is that it is an Elementary Particle ... (May be that's what they were aiming at expaining ... Not sure though)
    Whether it is a point particle or not is a different story ... and a long story.
    Two remarks to think about:
    1. What about the Classical Radius of the Electron? ... (e.g. E&M-wise)
    2. Quantum Mechanically it is described by a wave function, not a point ...
    Note: wiki is not always reliable.
  5. Jan 2, 2018 #4
    It may indeed be the case. See 'Point particle' in wiki. In particular:
    "Elementary particles are sometimes called "point particles", but this is in a different sense than discussed above."
    "In quantum mechanics, the concept of a point particle is complicated by the Heisenberg uncertainty principle, because even an elementary particle, with no internal structure, occupies a nonzero volume."

    I think that explains a lot (by wiki itself).
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