Like I said, you talk so much arse!
You think that SR was presented and accepted before it was known that the speed of light is unaffected by the relative velocity of the emitter? Lol!
You said he never said that yet you just admitted it.
you're not thinking properly
What the fcuk is wrong with you?
You said that SR is what showed that the speed of light is constant.
Albert Einstein, in his theory of special relativity, determined that the laws of physics are the same for all non-accelerating observers, and he showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels.
So I pointed out that SR does NOT show that the the speed of light is constant. It describes what happens IF it is constant, something that was obviously already known prior to the formulation of SR. If it wasn't known then there would have been no need for SR.
What's your point? You said "... and he showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels." That's wrong, there would have been no need for SR if it hadn't already been shown that the speed of light is constant in all inertial reference frames. The consistency of the speed of light is a postulate of SR, SR does nothing to validate that postulate other than to show that it actually does work.
Edited by A-wal, 04 January 2019 - 05:11 AM.