Most of what we now about electrodynamics has been severely truncated to benefit the slave masters in power. You learn about longitudinal waves for sound, but you do not learn them for charge carrying particles. You truncate any notion in the maths that make this obvious first by abandoning Maxwells quaternion and utilizing heavisides vector notation, then truncating the divergence of the magnetic vector potential for no other reason than math is hard, and than finally ignoring that destructive interference doesn't cancel out energy, but imposes stress on spacetime, leading to energy flow where
