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found this in a high school physics book from 1923 in a used bookstore (i didn't buy it though)
@bunnyhero That's based on the theory of Luminiferous Ether: https://en.wikipedia.org/wiki/Luminiferous_aether
which Einstein finally KO-ed with relativity. But there were still people pushing "ether" in the 20s and 30s. Some of them even aligned with the Nazis out of spite for Einstein!
@bunnyhero Yeah even science is not immune to wacko ideology. "Aryan Physics" was an actual pseudo-science thing: https://en.wikipedia.org/wiki/Deutsche_Physik
@KnowPresent whoa i didn't know about the nazi connection!