Why No One Has Measured The Speed Of Light

Physics students learn the speed of light, c, is the same for all inertial observers but no one has ever actually measured it in one direction. Thanks to Kiwico for sponsoring this video. For 50 off your first month of any crate, go to Huge thanks to Destin from Smarter Every Day for always being open and willing to engage in new ideas. If you haven t subscribed already, what are you waiting for: For an overview of the oneway speed of light check out the wiki page: The script was written in consultation with subject matter experts: Prof. Geraint Lewis, University of Sydney Prof. Emeritus Allen Janis, University of Pittsburgh Prof. Clifford M. Will, University of Florida The stuff that s correct is theirs. Any errors are mine. References: Einstein, A. (1905). On the electrodynamics of moving bodies. Annalen der physik, 17(10), 891921. (English) (German) ve42.