this post was submitted on 23 Oct 2025
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Moving atoms don't physically touch each other. They transfer their momentum with photons. Measuring the heat of a volume of gas is technically the measurement of the number of photon exchanges.
Wtf, is that true? Aren't photons weightless? It's all black magic.
https://profoundphysics.com/if-photons-have-no-mass-how-can-they-have-momentum/