The speed of light in free space is a physical constant defined as 299,792,458 metres per second. It is often denoted by the symbol c - originating from the Latin word celéritās (speed). The speed of light was officially included in the International System of Units on October 21, 1983, leaving the metre defined in terms of both c and the second.
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Recent Edits
| Date | Editor | Comment |
|---|---|---|
| Feb 8, 22:52 | 24.183.108.224 | (→Practical effects of finiteness) |
| Feb 8, 22:50 | 24.183.108.224 | (→Fundamental role in physics) |
| Feb 8, 22:50 | Materialscientist | (Reverted edits by 24.183.108.224 (talk) to last version by DVdm) |
| Feb 7, 22:21 | DVdm | (Reverted edits by Soupninja98 (talk) to last version by FoxBot) |
| Feb 7, 22:20 | Soupninja98 | |
| Feb 4, 18:37 | FoxBot | (r2.6.5) (Robot: Adding ga:Luas an tsolais) |
| Jan 27, 11:26 | RjwilmsiBot | (→Faster-than-light observations and experiments: CiteCompletion, dates: 1, locations: 1, using AWB (7940)) |
| Jan 25, 08:23 | Materialscientist | (rvt edits by Abhinavdhere - this needs reliable and verifiable source; there was some previous discussion suggesting confusion in some sources on that) |
| Jan 25, 08:22 | Abhinavdhere | (→Early history) |
| Jan 25, 08:21 | Abhinavdhere | (→Early history) |
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