Eddy currents in the plates will produce a magnetic field. In a perfect capacitor no electrons will flow across the gap. But there will be electrons moving in a real capacitor across the gap, especially above dielectric breakdown voltages. Any accelerating electron will produce an EM field...
Or an infinite amount of space and an infinite amount of time that the light wave has been in existence.
Boundary conditions like to muck up pure waveforms. =)
Politics of the era, and who was able to promote their version of generation. Historically.
As for practical, this is such an open and general question that a discussion is beyond the scope of the limited space in this thread.
Why should there be a flux of electrons from the surface of the sphere?
Do you mean you are creating an arbitrary Gaussian surface within the sphere and figuring out the current density through that surface?
You can treat this as a diffusion problem with spherical symmetry and the classical...
The light emitted by an orbital transition in general is not correlated spatially in a free atom. This means that the light is free to be emitted in any general direction, and that the "average" of the directions of emitted photons should be zero.
Since the spontaneous emission of a photon...