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A comment on Negative Mass. Parent comment

Re:Negative Mass by _Microft on Sunday July 16, 2023 @11:40AM (#36748231)
There are actual negative temperatures (Kelvin scale!). One example are lasers in which a population inversion facilitates lasing.

https://en.wikipedia.org/wiki/Laser

https://en.wikipedia.org/wiki/Population_inversion

https://en.wikipedia.org/wiki/Negative_temperature#Lasers

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