Faster than speed of light

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I thought time was defined by the frequency of light emitted by a Cesium atom in a certain energy state. At least, the second is defined that way.
 
Raz,

A second may be measured that way or even defined that way, but it doesn't mean that it has anything to do with the essence of time.
 
But you all have left out on very important principal in the impossibility of absolute zero. The Pauli exclusion principal. It states that the mare accuratly you know the position of a particle, the less accurately you can know its velocity and vice versa. At absolute zero, you know with 100% certainty, a particle's location because it's velocity is zero. And this of course is impossible because of the principal. And yes, a particles temperature is a measurement of its velocity because even in a sealed container, the particle is constantly moving in some arbitrary direction (i.e. Brownian motion)
 
kentheee, the motion of the cesium atom is irrelevant. It's simply there to emit a photon. It's the frequency of the photon which defines the second.

Nihilist, you have to measure the location of something to know its position. If something's at absolute zero, you don't know where it is until you measure its location, and thus give it the possibility of having a velocity (due to observation), and it wouldn't be at absolute zero anymore. Thus the difficulty with uncertainty.
 
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