Abstract
The flux of angular momentum of the electromagnetic field of an arbitrarily moving point charge is investigated. General equations for the transfer of angular momentum at arbitrary distance from the charge are obtained, and corresponding equations in the far-field approximation are derived. An explicit expression is obtained for the flux of angular momentum in the wave zone in terms of coordinates, velocity, and acceleration of the charge. The torque that would act on an object if it absorbs the incident radiation is calculated. It is shown that this torque is proportional to the curl of the stress tensor of the electromagnetic field; in the far-field approximation the torque is proportional to the curl of the Poynting vector. Application of the obtained formulas is illustrated by the example of a rotating dipole.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.