Question: What literature would you recommend to read about the nature of longitudinal waves?
Koltsov S. V.: It is practically absent, because in our academic institutions this topic is for some reason classified as “secret” or “ owls. secret." Therefore, many orthodox electrodynamicists generally simply say: “yes, this is quackery and there are no such longitudinal waves.” However, in Germany and in the USA, the presence of longitudinal waves was claimed, do not believe it, in court..