Btw., even the Wikipedia article contains a nice explanation of what I'm talking about (and, yes, I'm of the Landau-Kapitsa-Okun school of thought, naturally):

Btw., even the Wikipedia article contains a nice explanation of what I'm talking about (and, yes, I'm of the Landau-Kapitsa-Okun school of thought, naturally): https://en.wikipedia.org/wiki/Mass_in_special_relativity#Controversy https://en.wikipedia.org/wiki/Mass_in_special_relativity#Con...