speed of light :: unit - conversion
http://conversion.org/speed/speed-of-light/
Speed of light is speed unit, symbol: [c]. Definition of 1 speed of light ≡ 299 792 458 m/s. Light velocity (in vacuum) is one of the basic physical constants. Sign c (Latin celeritas = speed). Its value is exactly: 299792458 m/s. Example: electromagnetic waves propagation speed 1 c.. Compared to metre per second, speed of light is bigger ...
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