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An electron in atom that rotate proton, has it radiation?

  1. Sep 30, 2015 #1
    Hi dears,i have a question about atom,in classic physics ,(Bohr theory) when a electron swing away a proton it have
    not radiates magnetic waves because if electron radiates magnetic wave it will drop on proton ,and atom will be Unstable!
    my question is ,in quantum mechanics that uses orbitals ,default is a electron radiate magnetic waves or not radiate magnetic waves????
    please answer me,thanks very much
     
  2. jcsd
  3. Sep 30, 2015 #2

    Nugatory

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    Quantum mechanics predicts that the electron will not radiate (except when changing orbitals) so the atom will be stable.
     
  4. Sep 30, 2015 #3

    blue_leaf77

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    This is one of the most commonly asked questions both in introductory quantum physics and in this very forum, one of our members has made a brief explanation on this issue ,see https://www.physicsforums.com/threads/why-dont-electrons-crash-into-the-nucleus-in-atoms.511179/ [Broken], although he may not mention the energy loss due to magnetic waves (well, if a magnetic field follows temporal evolution, it should also radiate electric field wave, and hence electromagnetic wave). In reality, when the atom is stable it will not radiate EM waves as the classical physics will have predicted.
     
    Last edited by a moderator: May 7, 2017
  5. Sep 30, 2015 #4
    Well to be fair, the apparent stability of non-ground states is simply a fault from not quantizing the EM field. The only quantitative disagreement between CM and QM is the existence of the ground state. (and the discrete energy levels, of course)
     
    Last edited by a moderator: May 7, 2017
  6. Sep 30, 2015 #5

    blue_leaf77

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    Spontaneous emission also exists in QM, although it's more properly treated when taking QED effect into account. When saying "stable" I actually meant the eigenstate of Hamiltonian, but I seemed to have forgotten the spontaneous emission.
     
  7. Oct 1, 2015 #6
    thanks for your replies,is there a better model for atom is new and justify these question!
     
  8. Oct 1, 2015 #7

    blue_leaf77

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    The best model for atomic system to date is quantum mechanics along with quantum electrodynamics which provides fine corrections.
     
  9. Oct 1, 2015 #8

    ZapperZ

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    Please read this FAQ:

    https://www.physicsforums.com/threads/why-dont-electrons-crash-into-the-nucleus-in-atoms.511179/ [Broken]

    Zz.
     
    Last edited by a moderator: May 7, 2017
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