>>11074078Electromagnetism was understood well enough, the aether was the medium they thought light traveled through, and experiments designed to detect this aether kept coming up goose eggs.
Eventually they figured out if you treat the speed of light as constant then it has all kinds of implications that were validated.
If you generalized both to the point of meaninglessness, then they're kind of similar, but looking into either of them demonstrates they're mutually exclusive to the other.