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Re: Timekeeping (was: Selenites)

From:Nik Taylor <fortytwo@...>
Date:Saturday, October 3, 1998, 4:32
Hawksinger wrote:
> In a way we already have, the basic time unit of System Internationale > (sp?) which includes the metric system, is the second, last I heard, > defined in terms of the frequency of a particular atom.
No, it's now defined as the distance light travels in 1/299792458 of a second. It used to be defined in terms of the wavelength of the radiation emited by a particular isotope of Cesium (?), but it was changed to the fraction of a second (thus defining the speed of light as 299,792,458 m/s). -- "A silent mouth is sweet to hear" - Irish proverb ICQ: 18656696 AOL: NikTailor