Light second: Difference between revisions
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Revision as of 13:14, 16 September 2007
The light second is the distance that the light travels in vacuum in one second and so is a unit of distance.
Similar units are the light minute, light hour, light day, light week, light month, light year.
numerical value
As opposed to the light year, whose value more or less depends on the definition of year, the values of the light second is defined exactly.