The electrodynamics spin has two mutually exclusive ideas. The spin density is proportional to the gradient of the electromagnetic energy density, according to a widely held belief. As a result, an infinite circular polarised plane wave does not include spin, whereas a real wave, which is bounded in space, carries all spin at its boundary separately from energy. The spin density, on the other hand, is proportional to the energy density, and the spin of plane waves is unrelated to the presence of barriers, according to the original concept. We calculate the spin fluxes of plane waves in various scenarios, as well as the previously overlooked spin flux in dipole radiation, using this notion. The reason for the change from this first notion to a spin proportionate to energy density gradient gradient is explained.
Author (S) Details
R. I. Khrapko
Moscow Aviation Institute, Moscow 125993, Russia.
View Book :- https://stm.bookpi.org/RTCPS-V1/article/view/3616
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