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Old 02-27-2006, 02:26 PM   #16
a different tim
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Join Date: Oct 2005
Location: Oxford, UK.
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I wouldn't call it an arbitrary construct. Those Caesium atoms vibrate more slowly than other Caesium atoms in a measurable way. The word may be arbitrary but the concept seems to provide a measurably accurate model of the natural phenomenon, which is all we can ask of our theories.

I only subscribe to conditions delineated by rods and clocks.....

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