SPEEDOFLIGHT
Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics. Its value is exactly 299,792,458 metres per second, a figure that is exact because the length of the metre is defined from this constant and the international standard for time. This is approximately 186,282.4 miles per second, or about 671 million miles per hour. According to special relativity, is the maximum speed at which all energy, matter, and information in the universe can travel. It is the speed at which all massless particles and associated fields travel in vacuum. It is also the speed of gravity predicted by current ...The above text is a snippet from Wikipedia: Speed of light
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speed of light
Noun
(abbreviated as c)
- The speed of electromagnetic radiation in a perfect vacuum: exactly 299,792,458 metres per second by definition.
The above text is a snippet from Wiktionary: speed of light
and as such is available under the Creative Commons Attribution/Share-Alike License.