Why No One Has Measured The Speed Of Light
Veritasium · 6 HN recommendations
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Veritasium explains why the one-way speed of light has never been measured, only the round-trip speed, since measuring it requires synchronized clocks that assume the answer. It explores the implications for relativity.
Why HN recommends it: Used as the standard reference in threads about light speed, clock synchronization and untestable assumptions in physics.
“I found the video very compelling even as a thought experiment.” Read on HN ↗