Experiment: Can an externally heated object actually heat its heat source?

[claudiu]

Hi @lexej and welcome.

@lexej

The greenhouse effect doesn’t violate the second law. The net heat flow is still surface>atmosphere>space. The fact that infrared-absorbing gasses reflect some of this heat back to the surface would not cause the surface to “heat up” in the absence of external solar radiation. The net effect is to slow down the rate of energy emission from the surface out into space. Net heat flows from hot to cold in every step.

I pose the same question to you (Experiment: Can an externally heated object actually heat its heat source? - #15 by claudiu): what do you predict will be the result of this hot plate / glass dome / foil experiment?