Fun Stuff > CHATTER
How "normal" do you think you are?
himynameisjulien:
I knew that, I was just making a point. If all motion ceases, then there can be no radioactivity; particles cannot be given off if hey can't move.
But there has to be some way, or else scientists and the like wouldn't have made this definition for a second.
KharBevNor:
I may be misunderstanding you, but no one has ever cooled anything down to absolute zero.
himynameisjulien:
--- Quote from: KharBevNor on 09 Jul 2008, 23:46 ---I may be misunderstanding you, but no one has ever cooled anything down to absolute zero.
--- End quote ---
You're right; it would be impossible, I think, to cool something to absolute zero.
The definition of a second, that I got from the almighty internet, was the one I posted; I assume that the difference in temperature (between the one they use and 0) is accounted for by a computer? Who knows. Unless the information I got is wrong, which it very well could be. Before I looked it up I thought it was something along the lines of x half-lives of y isotope of z element (einsteinium? most unstable element, could be).
http://en.wikipedia.org/wiki/Second
Under "International Second".
I'm no nuclear physicist, so I could be misunderstanding this.
jhocking:
--- Quote from: himynameisjulien on 09 Jul 2008, 19:57 ---I knew that, I was just making a point.
--- End quote ---
Not sure what you're responding to, since you didn't bother to quote and the previous message had nothing to do with this, but I'm gonna go ahead and assume you're responding to my post, since I'm the last one who addressed you. In which case, I was simply correcting your wording. It doesn't matter if you knew that saying "rest temperature" is not the same as saying "absolute zero," the point is you said it and I was correcting your mistake.
Anyway, as far as your supposition that things cannot give off radiation at absolute zero, you are incorrect. You are correct that at absolute zero there is no radiation in the sense that the environment currently does not have any radiation, and it wouldn't be absolute zero anymore after the caesium atom gave off some radiation, but that has nothing to do with whether or not any radiation can be given off. And as you surmise the difference between the theoretical situation and reality is accounted for when making the calculation:
reference to correcting for ambient radiation of environment
himynameisjulien:
jhocking:
Oh, I think I misunderstood you the first time then. Thanks for correcting.
How can radiation be given off? At absolute 0, there is no energy, so the atom cannot emit radiation because it has no energy to spare.
http://www.newton.dep.anl.gov/askasci/phy05/phy05142.htm
Sorry if that's not a clickable link, I have no clue how to do those unless the forum has a system that does it for me.
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