‘Negative temperature’ thermodynamics is observed in a photon gas
Compression and expansion seen in optical experiment
Read article: ‘Negative temperature’ thermodynamics is observed in a photon gas
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Sam Jarman is a freelance science writer based in the UK. He has written for Physics World since 2017 and contributes regularly to publications including APS Physics Magazine, Phys.org and Philosophical Magazine, with news and feature articles spanning many different areas of physics. He also writes official press releases on behalf of Springer Nature and Elsevier physics journals.
Compression and expansion seen in optical experiment
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