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If a perfect vacuum was created within the earths atmosphere, what would it’s temperature be?

Marshall Scudder
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1 Answers1

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If it was an absolutely perfect vacuum there would be no particles to have temperature, as the temperature is the average kinetic energy of the random motions of each particle.

ElderNoSpace
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    The vacuum will be full of photons, and those photons have a temperature just like particles of matter. – John Rennie May 07 '18 at 07:58
  • I took a perfect vacuum to have no particles whatsoever, if the vacuum had any particles the temperature would be dependant on those and the question would need a lot more information. – ElderNoSpace May 07 '18 at 08:04
  • 0.2K for all degrees of freedom would have zero point energy. – my2cts May 07 '18 at 15:24