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by OldCW wears The COAT of the Cosmos on July 14th, 2009
It quite possible to measure the speed of light quite accurately. It was done a long, long time ago. You just set up enough mirrors far enough apart so that the light has to travel a long enough distance so that the time from start to finish is measurable.
From Wikipedia:
"the effect of this definition is to fix the speed of light in vacuum at exactly 299 792 458 m/s."
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You're reading How does one prove the actual speed of light instead of just estimating it with formula? Since nothing can match the speed of light, no device is "fast" enough to capture light to measure it's speed. What is the most accurate estimate of it's speed today?
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