"Speed of light independent of the speed of the emitter" is false but in 1905 no one (except for Walther Ritz) questioned it, as it was the central tenet of the ether theory. However, combined with the principle of relativity, "speed of light independent
of the speed of the emitter" entails "speed of light independent of the speed of the observer", which is obvious nonsense. Etherists never accepted it and ended up entangled in ambiguity:
Olivier Darrigol, The Mystery of the Einstein-Poincaré Connection: "It is clear from the context that Poincaré meant here to apply the postulate [of constancy of the speed of light] only in an ether-bound frame, in which case he could indeed state that
it had been "accepted by everybody." In 1900 and in later writings he defined the apparent time of a moving observer in such a way that the velocity of light measured by this observer would be the same as if he were at rest (with respect to the ether).
This does not mean, however, that he meant the postulate to apply in any inertial frame. From his point of view, the true velocity of light in a moving frame was not a constant but was given by the Galilean law of addition of velocities."
https://www.
jstor.org/stable/10.1086/430652
Einstein camouflaged the nonsense by vandalizing space and time - Neil deGrasse Tyson calls the procedure "cosmic conspiracy of the highest order":
"But this seems to be nonsense. How can it happen that the speed of light relative to an observer cannot be increased or decreased if that observer moves towards or away from a light beam? Einstein states that he wrestled with this problem over a lengthy
period of time, to the point of despair."
https://history.aip.org/exhibits/einstein/essay-einstein-relativity.htm
"Einstein pulled all of these ideas together in his 1905 theory of special relativity, which postulated that the speed of light was a constant. For this to be true, space and time had to be combined into a single framework that conspired to keep light's
speed the same for all observers."
https://www.livescience.com/space-time.html
Neil deGrasse Tyson, Death by Black Hole: And Other Cosmic Quandaries, pp. 123-124: "If everyone, everywhere and at all times, is to measure the same speed for the beam from your imaginary spacecraft, a number of things have to happen. First of all, as
the speed of your spacecraft increases, the length of everything - you, your measuring devices, your spacecraft - shortens in the direction of motion, as seen by everyone else. Furthermore, your own time slows down exactly enough so that when you haul
out your newly shortened yardstick, you are guaranteed to be duped into measuring the same old constant value for the speed of light. What we have here is a COSMIC CONSPIRACY OF THE HIGHEST ORDER."
https://www.amazon.com/Death-Black-Hole-Cosmic-
Quandaries/dp/039335038X
Brian Greene: "If space and time did not behave this way, the speed of light would not be constant and would depend on the observer's state of motion. But it is constant; space and time do behave this way. Space and time adjust themselves in an exactly
compensating manner so that observations of light's speed yield the same result, regardless of the observer's velocity."
http://www.pbs.org/wgbh/nova/physics/special-relativity-nutshell.html
Pentcho Valev
https://twitter.com/pentcho_valev
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