Two questions about electron's magnetic spin












4















  1. Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?


  2. Does the spin mean that it generates magnetic field even if it is at rest?



I expect to get 'no' to both questions because we always say moving charges generate magnetic field. And I hope to see answers which will clear my confusion.






electromagnetism electrons magnetic-moment







share|cite|improve this question




















  • 1




    Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
    – StudyStudy
    Dec 2 '18 at 22:25






  • 1




    @physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
    – GiorgioP
    Dec 2 '18 at 23:03










  • Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
    – physicsguy19
    Dec 3 '18 at 6:01
















4















  1. Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?


  2. Does the spin mean that it generates magnetic field even if it is at rest?



I expect to get 'no' to both questions because we always say moving charges generate magnetic field. And I hope to see answers which will clear my confusion.






electromagnetism electrons magnetic-moment







share|cite|improve this question




















  • 1




    Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
    – StudyStudy
    Dec 2 '18 at 22:25






  • 1




    @physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
    – GiorgioP
    Dec 2 '18 at 23:03










  • Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
    – physicsguy19
    Dec 3 '18 at 6:01














4












4








4


1






  1. Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?


  2. Does the spin mean that it generates magnetic field even if it is at rest?



I expect to get 'no' to both questions because we always say moving charges generate magnetic field. And I hope to see answers which will clear my confusion.






electromagnetism electrons magnetic-moment







share|cite|improve this question
















  1. Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?


  2. Does the spin mean that it generates magnetic field even if it is at rest?



I expect to get 'no' to both questions because we always say moving charges generate magnetic field. And I hope to see answers which will clear my confusion.






electromagnetism electrons magnetic-moment




electromagnetism electrons magnetic-moment






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Dec 2 '18 at 22:26









Emilio Pisanty

82k21199410




82k21199410










asked Dec 2 '18 at 21:45









physicsguy19

823118




823118








  • 1




    Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
    – StudyStudy
    Dec 2 '18 at 22:25






  • 1




    @physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
    – GiorgioP
    Dec 2 '18 at 23:03










  • Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
    – physicsguy19
    Dec 3 '18 at 6:01














  • 1




    Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
    – StudyStudy
    Dec 2 '18 at 22:25






  • 1




    @physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
    – GiorgioP
    Dec 2 '18 at 23:03










  • Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
    – physicsguy19
    Dec 3 '18 at 6:01








1




1




Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
– StudyStudy
Dec 2 '18 at 22:25




Possible duplicate of physics.stackexchange.com/questions/9969/… but I wrote a short answer, as it seems more appropriate for the OP to learn more from. (Hopefully)
– StudyStudy
Dec 2 '18 at 22:25




1




1




@physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
– GiorgioP
Dec 2 '18 at 23:03




@physicsguy19: the answer by Hans de Vries present in the link cited by StudyStudyStudy contains the answer to your question. n.2. The wavefunction of a charged particle with a non-zero spin carries a current which explains the magnetic dipole of the electron.
– GiorgioP
Dec 2 '18 at 23:03












Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
– physicsguy19
Dec 3 '18 at 6:01




Thank you. Actually I'm so happy to get a 'yes' for both questions 👍 I love this site.
– physicsguy19
Dec 3 '18 at 6:01










2 Answers
2






active

oldest

votes


















6














The electron can be seen as a small magnet with the field of a magnetic dipole of strength $2mu_B vec S$. So my answer is yes in both cases. I interpret as at rest a state in which the electron has zero momentum expectation value. Note that there is no accepted model of spin as a rotation, although spin is an angular moment to every effect.






share|cite|improve this answer























  • does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
    – physicsguy19
    Dec 3 '18 at 8:05










  • Yes, that is correct.
    – my2cts
    Dec 3 '18 at 8:22










  • @my2cts: which one is correct?:) sorry..
    – physicsguy19
    Dec 3 '18 at 8:47






  • 1




    @StudyStudy No motion or translation will occur in a uniform field.
    – my2cts
    Dec 3 '18 at 9:23






  • 1




    It will move as the field is nonuniform. In your original question you assumed a uniform field.
    – my2cts
    Dec 3 '18 at 12:59



















7















Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?




Yes. There are no known magnetic monopoles, see: Magnetic Monopoles




Does the spin mean that it generates magnetic field even if it is at rest?




Yes, but as regards "at rest", you should read this answer: Electron at rest



Magnetic spin isn't really a proper term, but an electron's spin is directly linked to its magnetic field, if we were to say that only moving electric charges produce magnetic fields, we would have trouble explaining how a static magnetic "works".



I would also stress that spin in this case is purely a mathematical idea, an electron does not resemble a very small rotating football in this case, its a bad choice of words made years ago.



If you read the links, you will get a better answer than this short reply.






share|cite|improve this answer























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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    6














    The electron can be seen as a small magnet with the field of a magnetic dipole of strength $2mu_B vec S$. So my answer is yes in both cases. I interpret as at rest a state in which the electron has zero momentum expectation value. Note that there is no accepted model of spin as a rotation, although spin is an angular moment to every effect.






    share|cite|improve this answer























    • does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
      – physicsguy19
      Dec 3 '18 at 8:05










    • Yes, that is correct.
      – my2cts
      Dec 3 '18 at 8:22










    • @my2cts: which one is correct?:) sorry..
      – physicsguy19
      Dec 3 '18 at 8:47






    • 1




      @StudyStudy No motion or translation will occur in a uniform field.
      – my2cts
      Dec 3 '18 at 9:23






    • 1




      It will move as the field is nonuniform. In your original question you assumed a uniform field.
      – my2cts
      Dec 3 '18 at 12:59
















    6














    The electron can be seen as a small magnet with the field of a magnetic dipole of strength $2mu_B vec S$. So my answer is yes in both cases. I interpret as at rest a state in which the electron has zero momentum expectation value. Note that there is no accepted model of spin as a rotation, although spin is an angular moment to every effect.






    share|cite|improve this answer























    • does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
      – physicsguy19
      Dec 3 '18 at 8:05










    • Yes, that is correct.
      – my2cts
      Dec 3 '18 at 8:22










    • @my2cts: which one is correct?:) sorry..
      – physicsguy19
      Dec 3 '18 at 8:47






    • 1




      @StudyStudy No motion or translation will occur in a uniform field.
      – my2cts
      Dec 3 '18 at 9:23






    • 1




      It will move as the field is nonuniform. In your original question you assumed a uniform field.
      – my2cts
      Dec 3 '18 at 12:59














    6












    6








    6






    The electron can be seen as a small magnet with the field of a magnetic dipole of strength $2mu_B vec S$. So my answer is yes in both cases. I interpret as at rest a state in which the electron has zero momentum expectation value. Note that there is no accepted model of spin as a rotation, although spin is an angular moment to every effect.






    share|cite|improve this answer














    The electron can be seen as a small magnet with the field of a magnetic dipole of strength $2mu_B vec S$. So my answer is yes in both cases. I interpret as at rest a state in which the electron has zero momentum expectation value. Note that there is no accepted model of spin as a rotation, although spin is an angular moment to every effect.







    share|cite|improve this answer














    share|cite|improve this answer



    share|cite|improve this answer








    edited Dec 2 '18 at 22:39









    Emilio Pisanty

    82k21199410




    82k21199410










    answered Dec 2 '18 at 22:33









    my2cts

    4,5272617




    4,5272617












    • does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
      – physicsguy19
      Dec 3 '18 at 8:05










    • Yes, that is correct.
      – my2cts
      Dec 3 '18 at 8:22










    • @my2cts: which one is correct?:) sorry..
      – physicsguy19
      Dec 3 '18 at 8:47






    • 1




      @StudyStudy No motion or translation will occur in a uniform field.
      – my2cts
      Dec 3 '18 at 9:23






    • 1




      It will move as the field is nonuniform. In your original question you assumed a uniform field.
      – my2cts
      Dec 3 '18 at 12:59


















    • does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
      – physicsguy19
      Dec 3 '18 at 8:05










    • Yes, that is correct.
      – my2cts
      Dec 3 '18 at 8:22










    • @my2cts: which one is correct?:) sorry..
      – physicsguy19
      Dec 3 '18 at 8:47






    • 1




      @StudyStudy No motion or translation will occur in a uniform field.
      – my2cts
      Dec 3 '18 at 9:23






    • 1




      It will move as the field is nonuniform. In your original question you assumed a uniform field.
      – my2cts
      Dec 3 '18 at 12:59
















    does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
    – physicsguy19
    Dec 3 '18 at 8:05




    does it mean that when an electron is released (with zero speed classically) in a uniform magnetic field, it just aligns its magnetic moment with the field and does no translational motion (classically)?
    – physicsguy19
    Dec 3 '18 at 8:05












    Yes, that is correct.
    – my2cts
    Dec 3 '18 at 8:22




    Yes, that is correct.
    – my2cts
    Dec 3 '18 at 8:22












    @my2cts: which one is correct?:) sorry..
    – physicsguy19
    Dec 3 '18 at 8:47




    @my2cts: which one is correct?:) sorry..
    – physicsguy19
    Dec 3 '18 at 8:47




    1




    1




    @StudyStudy No motion or translation will occur in a uniform field.
    – my2cts
    Dec 3 '18 at 9:23




    @StudyStudy No motion or translation will occur in a uniform field.
    – my2cts
    Dec 3 '18 at 9:23




    1




    1




    It will move as the field is nonuniform. In your original question you assumed a uniform field.
    – my2cts
    Dec 3 '18 at 12:59




    It will move as the field is nonuniform. In your original question you assumed a uniform field.
    – my2cts
    Dec 3 '18 at 12:59











    7















    Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?




    Yes. There are no known magnetic monopoles, see: Magnetic Monopoles




    Does the spin mean that it generates magnetic field even if it is at rest?




    Yes, but as regards "at rest", you should read this answer: Electron at rest



    Magnetic spin isn't really a proper term, but an electron's spin is directly linked to its magnetic field, if we were to say that only moving electric charges produce magnetic fields, we would have trouble explaining how a static magnetic "works".



    I would also stress that spin in this case is purely a mathematical idea, an electron does not resemble a very small rotating football in this case, its a bad choice of words made years ago.



    If you read the links, you will get a better answer than this short reply.






    share|cite|improve this answer




























      7















      Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?




      Yes. There are no known magnetic monopoles, see: Magnetic Monopoles




      Does the spin mean that it generates magnetic field even if it is at rest?




      Yes, but as regards "at rest", you should read this answer: Electron at rest



      Magnetic spin isn't really a proper term, but an electron's spin is directly linked to its magnetic field, if we were to say that only moving electric charges produce magnetic fields, we would have trouble explaining how a static magnetic "works".



      I would also stress that spin in this case is purely a mathematical idea, an electron does not resemble a very small rotating football in this case, its a bad choice of words made years ago.



      If you read the links, you will get a better answer than this short reply.






      share|cite|improve this answer


























        7












        7








        7







        Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?




        Yes. There are no known magnetic monopoles, see: Magnetic Monopoles




        Does the spin mean that it generates magnetic field even if it is at rest?




        Yes, but as regards "at rest", you should read this answer: Electron at rest



        Magnetic spin isn't really a proper term, but an electron's spin is directly linked to its magnetic field, if we were to say that only moving electric charges produce magnetic fields, we would have trouble explaining how a static magnetic "works".



        I would also stress that spin in this case is purely a mathematical idea, an electron does not resemble a very small rotating football in this case, its a bad choice of words made years ago.



        If you read the links, you will get a better answer than this short reply.






        share|cite|improve this answer















        Does electron's magnetic spin mean that we can think of it as having the two magnetic poles?




        Yes. There are no known magnetic monopoles, see: Magnetic Monopoles




        Does the spin mean that it generates magnetic field even if it is at rest?




        Yes, but as regards "at rest", you should read this answer: Electron at rest



        Magnetic spin isn't really a proper term, but an electron's spin is directly linked to its magnetic field, if we were to say that only moving electric charges produce magnetic fields, we would have trouble explaining how a static magnetic "works".



        I would also stress that spin in this case is purely a mathematical idea, an electron does not resemble a very small rotating football in this case, its a bad choice of words made years ago.



        If you read the links, you will get a better answer than this short reply.







        share|cite|improve this answer














        share|cite|improve this answer



        share|cite|improve this answer








        edited Dec 2 '18 at 22:14

























        answered Dec 2 '18 at 22:05









        StudyStudy

        3879




        3879






























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