Richard Feynman unwittingly disproves Einstein's relativity in the text below. The number of meters of waves the observer has swept past is (c+v)t. Accordingly, the speed of the light waves relative to the observer is c'=c+v, as per Newton's theory.

Richard Feynman: "Suppose, now, that the source is standing still and is emitting waves at frequency ω_0, while the observer is moving with speed v toward the source. After a certain period of time t the observer will have moved to a new position, a distance vt from where he was at t=0. How many radians of phase will he have seen go by? A certain number, (ω_0)t, went past any fixed point, and in addition the observer has swept past some more by his own motion, namely a number vt(k_0) (the number of radians per meter times the distance). [...] For the case of light, we know that k_0 = (ω_0)/c." https://www.feynmanlectures.caltech.edu/I_34.html

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