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Negative kinetic energy value for an electron

  1. Sep 26, 2014 #1
    I have been going through dirac's paper on quantized singularities in the electromagnetic field and there he referred to a problem of negative kinetic energy of electron, what does it mean?

    I am going to make a presentation on magnetic monopole next month so I need an explanatory answer

  2. jcsd
  3. Sep 26, 2014 #2


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    Science Advisor

    I haven't looked up the context of the paper, but an electron can be thought of as having negative kinetic energy in the evanescent part of the wave, such as inside a barrier that an electron tunnels through. The electron is allowed to be detected in a classically forbidden position.
  4. Sep 26, 2014 #3


    Staff: Mentor

  5. Sep 27, 2014 #4
    I don't think you can ever detect a particle in the classically forbidden region.
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