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To: DuncanWaring
2. The duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.

At what temperature?

10 posted on 08/20/2009 8:33:41 AM PDT by dirtboy
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To: dirtboy

0 Kelvin.

Don’t forget to correct for gravitational time dilation.


12 posted on 08/20/2009 8:36:55 AM PDT by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: dirtboy

NERDS!!!


15 posted on 08/20/2009 8:38:05 AM PDT by tgusa (Gun control: deep breath, sight alignment, squeeze the trigger ....)
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To: dirtboy
At what temperature?

The electron resonance frequency of the cesium atom does not vary with temperature.

21 posted on 08/20/2009 8:43:35 AM PDT by MosesKnows (Love many, Trust few, and always paddle your own canoe)
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To: dirtboy

Temperature is to do with the movement of molecules.

At any temperature where Caesium is still Caesium, those hyperfine levels internal to Caesium won’t change.

Analogy: no matter how fast you drive your car, the distance between your pedals doesn’t change. Unless you crash the car :0)


24 posted on 08/20/2009 8:47:09 AM PDT by agere_contra
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To: dirtboy; DuncanWaring

Is that the unladen air-speed of an African or a European swallow?


30 posted on 08/20/2009 8:56:37 AM PDT by BlueLancer (I'm getting a fine tootsy-frootsying right here...)
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