PhysicsHigh | why is the speed of light a precise value? @PhysicsHigh | Uploaded 4 years ago | Updated 21 hours ago
The speed of light exactly 299792458 m/s. It was set that value. This video looks how it got to this point and also explores some of the more recent attempts at measuring the speed of light, including Michelson and Eveson. I also explore how the meter definition was refined over time and led to its redefinition based on the speed of light.


Errata: A small typo in my title that appears briefly at 0:47. The last three numbers should be 458, not 568. Sorry - The T shirt is correct!!

Also see
History of the Speed of Light - https://youtu.be/jUHgIYNEzJQ

Measuring the speed of light using chocolate - https://youtu.be/qxy93wrpttY

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