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Updated January 24, 2022
  

Image: Bose-Einstein condensation in a gas as a function of temperature.
At room temperature, the wavelength of air molecules (nitrogen, oxygen) is extremely small (about 0.2 angstrom, 1Å=10−10 m).
The thermal wavelength equation tells us that as the speed decreases the wavelength increases and if the wavelength increases the wave packets associated with each particle get bigger and bigger. The volume in the container does not vary, λth increases until reaching the distance between particles. At this moment an astonishing phase transition occurs. This phenomenon was predicted in 1925 by Albert Einstein.

 
           
   
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