International System of Units/Related Articles: Difference between revisions

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imported>John R. Brews
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{{r|Speed of light}}
{{r|Speed of light}}
{{r|Special relativity}}
{{r|Special relativity}}
{{r|Free space}}
{{r|Free space (electromagnetism)}}

Revision as of 11:28, 26 March 2011

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A list of Citizendium articles, and planned articles, about International System of Units.
See also changes related to International System of Units, or pages that link to International System of Units or to this page or whose text contains "International System of Units".

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  • Speed of light [r]: A physical constant c describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/c seconds, using the defined value c = c0299  792  458 m/s (exact). [e]
  • Special relativity [r]: Theory of the effects of motion on observations of things such as length, time, mass and energy. The theory is based on the postulates that all laws of physics are the same in all inertial reference systems, and that the vacuum speed of light is a universal constant, independent of the speed of the source. [e]
  • Free space (electromagnetism) [r]: In classical electromagnetism, the vacuum reference state with no fields or particles; in quantum mechanics, the vacuum state with electromagnetic fields fluctuating about an average value of zero. [e]