What is the history behind determining the speed of light? How did past scientists determine it'salue value
This video covers Rømer, Bradley, Fizeau and Foucault and how they determined the speed of light.

CORRECTION: As some have noted I have made an error in the discussion on Rømer. I acknowledge this , and here is my correction as well as animation: [ Ссылка ]

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Check out also:
Using a microwave to determine lightspeed - [ Ссылка ]

Why the speed of light is precisely 299 792 458 m/s - [ Ссылка ]

Maxwell who determined light was an electromagnetic wave - [ Ссылка ]

Michelson and Morley's null result at detecting Aether - [ Ссылка ]

An Intro to Special Relativity which relies on the constancy of the speed of light - [ Ссылка ]

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