https://www.youtube.com/watch?v=n2s1-RHuljo
Neil deGrasse Tyson: "The speed of light in a vacuum is constant no matter who is doing the measurment... (...) That's Assumption 1 which by the way the experiment has shown to be true."

Which experiment, Neil deGrasse Tyson? The Michelson-Morley one? The Alväger one?

http://mysite.verizon.net/cephalobus...et_al_1964.pdf
Test of the second postulate of special relativity in the GeV region, Alväger, T.; Farley, F. J. M.; Kjellman, J.; Wallin, L., 1964, Physics Letters, vol. 12, Issue 3, pp.260-262

Is there an experiment proving the constancy of the speed of light and more reliable than the Alväger's 1964 experiment, Neil deGrasse Tyson?

Pentcho Valev