> [R]ays move just the same if what puts them off is held fast or not. Izzy had no way to know that, back then, but it's true. Isn't this historically inaccur

> [R]ays move just the same if what puts them off is held fast or not. Izzy had no way to know that, back then, but it's true. Isn't this historically inaccurate? Wasn't Einstein looking for an explanation for why Maxwell's equations mysteriously assigned a constant velocity to electromagnetic phenomena, apparently contradicting Galilean relativity?