Invoking Maxwell's classical equations in conjunction with expressions for the electromagnetic (EM) energy, momentum, force, and torque, we use a few simple examples to demonstrate the nature of the EM angular momentum. The energy and the angular momentum of an EM field will be shown to have an intimate relationship; a source radiating EM angular momentum will, of necessity, pick up an equal but opposite amount of mechanical angular momentum; and the spin and orbital angular momenta of the EM field, when absorbed by a small particle, will be seen to elicit different responses from the particle.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/625947 |
| Date | 01 June 2017 |
| Creators | Mansuripur, Masud |
| Contributors | College of Optical Sciences, The University of Arizona |
| Publisher | IOP PUBLISHING LTD |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2017 The Royal Swedish Academy of Sciences. |
| Relation | http://stacks.iop.org/1402-4896/92/i=6/a=065501?key=crossref.40820c8907c3318ee1d659efe9e92d33 |
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