1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Point entity?

  1. Jun 19, 2008 #1
    why we take electrons as point particles? just because of its magnetic moment?
    maybe there is something wrong with the idea of the magnetic moment of a point charge.
    i appreciate if you help.
  2. jcsd
  3. Jun 19, 2008 #2


    User Avatar

    Staff: Mentor

    So far, we have no experimental evidence (from high-energy scattering experiments, for example) that electrons have structure or a finite size. All we can do so far is find upper limits on the size of an electron.

    For example, see http://arxiv.org/abs/hep-ph/0002172 which uses an experiment at LEP to set an upper limit of about [itex]10^{-19}[/itex] m for the electron radius. (That doesn't mean that they actually found such a size, it just means that if the electron has a size, it must be smaller than that or else they would have "seen" it.)
    Last edited: Jun 19, 2008
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?