Quote:
[i]Originally posted by FV623
**I'm defining seconds as the SI unit being 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 cesium 133 atom, where the ground state is defined at zero magnetic field.
R. [/B]
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And what temperature? Mustn't forget the effect temperature has on the period of oscillation of the outer valence electrons and the corresponding measurement thereof.
CHIMO!