Re: Can heat flow from vacuum?

Hi Amit,

Thank you for your question. It is, fortunately, rather easily answered. “Temperature” or “heat” is related to the random kinetic energy of molecules. If you for instance heat a gas, its molecules will pick up speed, and this energy in these molecules is the heat in the gas, and determines its temperature. There are other mechanisms by which heat can get stored in matter, but there is one, unifying characteristic: for something to be able to absorb energy, and turn it into heat, there has to be mass. For this reason, a vacuum cannot be heated up, as there is nothing for the energy to go into. I hope this answers your question.

Regards,

Bart Broks,