On Apr 19, 12:43*pm, "Ian"
wrote:
Anyone understand what Szczepan means by "oscillatory electron flow",
please?

Back when physicists and engineers were ignorant of the existence of
photons, that was the best they could do to explain electromagnetic
fields surrounding free electrons being energized by AC signals.
Nowadays, we know that at RF, the electrons oscillate virtually in
place and it is the photons that are responsible for energy transfer
(flow).
--
73, Cecil, w5dxp.com