Symbols:C/Speed of Light

Speed of Light

$c$

The speed of light (in a vacuum) is a physical constant.

Information cannot travel faster.

It is usually denoted $c$, and its value is given as:

$c = 299 \, 792 \, 458 \text { m s}^{-1}$

exactly.

The metre is in fact defined in terms of the speed of light and the definition of the second.

Its $\LaTeX$ code is c .

Sources

• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): speed of light