The Action Lab: Energy Density in a vacuum, Temperature in a vacuum in a box
The Action Lab: What Is The Temperature in a Vacuum Chamber? Is it Hot, Cold or Neither? at https://www.youtube.com/watch?v=-hTAr2GkhpM There are three fields inside your box after the air is removed. There is an electromagnetic field in equilibrium with the walls of the box, and with the light and electromagnetic waves in the room. If you
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