Speed of light
The speed of light in a vacuum is defined to be 299,792,458 metres per second (1,079,252,848.8 km/h, which is approximately 186,282.4 miles per second, or 670,616,629.38 miles per hour). The speed of light is denoted by the letter c, reputedly from the Latin celeritas, "speed", and also known as Einstein's constant. Note that this speed is a definition, not a measurement; in fact, the fundamental SI unit of distance, the metre, is defined in terms of the speed of light and the second. The speed of light through a transparent medium (that is, not in vacuum) is less than c; the ratio of c to this speed is called the refractive index of the medium. "Speed of light" is sometimes abbreviated SOL.
See also
~ Table of Content ~
| ► | Introduction |
| ► | Overview |
| ► | Communications |
| ► | Physics |
| ► | History |
| ► | See also |
| ► | References |
| ► | External links |
~ What's Hot ~
Up In The Air, The Goods Live Hard Sell Hard, Alvin And The Chipmunks The Squeakquel, Legion, 500 Days Of Summer, The Mummy 4 Rise Of The Aztec, The Blind Side, Dear John, The Ugly Truth, New Moon, The Karate Kid, Madagascar 3, All About Steve, Avatar, Twilight, The Princess And The Frog, My Sister S Keeper, Clash Of The Titans, The Boondock Saints Ii All Saints Day, The Hangover,
~ Community ~
| ► | History Forum Come and discuss about History, Civilizations, Historical Events and Figures |
| ► | History Web-Ring A community of sites, blogs and forums dedicated to History. Do not hesitate to submit your site. |
and are licensed under the GNU Free Documentation License.
Lexicon - Privacy Policy - Spiritus-Temporis.com ©2005.