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B Temperture of a vacuum?

  1. Mar 13, 2018 #1

    zuz

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    What is the temperature of a vacuum? Could this be used as an insulator in windows/homes?
     
  2. jcsd
  3. Mar 13, 2018 #2

    BvU

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    Thermodynamically, temperature for a vacuum does not exist (there is nothing that can have a temperature).
    In windows/homes it isn't practical to maintain a vacuum just for its insulating properties: withstanding the forces from the atmospherical presssure would require a massive construction.
    Real vacuum flasks aren't really vacuum, they just lower the pressure between the bottles
     
  4. Mar 13, 2018 #3
    Depending on context, a space with only black body radiation is often interpreted as a vacuum with a certain temperature T.
     
  5. Mar 13, 2018 #4

    BvU

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  6. Mar 13, 2018 #5

    davenn

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    It already is. Some window double glazing (2 sheets of glass vacuum or air between) methods already do this
    Air is a poor conductor of heat

    from wiki

    Dave
     
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