huyen_vyvy
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What is really meant by temperature and negative absolute temperature? Is that an abnormal state that happens during population inversion in laser?
Understanding Negative Absolute Temperature: Myth or Reality?
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You may find the following link useful.
http://www.maxwellian.demon.co.uk/art/esa/negkelvin/negkelvin.html
http://www.maxwellian.demon.co.uk/art/esa/negkelvin/negkelvin.html
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