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    • Keywords


      Larmor precession and nutation; charged-particle orbits in electromagnetic fields; atom in a magnetic field

    • Abstract


      The classical non-relativistic problem of the motion of a charged particle in an external central force field and a weak uniform magnetic field is revisited to show that the motion of the kinetic angular momentumL = r × p of the particle, in the so-called Larmor approximation, is not a simple precession but is actually a composite motion involving precession as well as a high frequency nutation. The precession-nutation motion ofL is discussed in the Larmor approximation when the Larmor-frame-orbit of the charged particle is an ellipse (or a circle) for the case of the two central forces namely the Coulomb and the Hooke-law-force, which are the only two central forces known to permit closed orbits.

    • Author Affiliations


      K N Srinivasa Rao1 A V Gopala Rao1

      1. Department of Studies in Physics, University of Mysore, Manasagangotri, Mysore - 570 006, India
    • Dates

  • Pramana – Journal of Physics | News

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