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Gravity is not electro-magnetic radiation. It would be independant of any other source of energy other than that inherent to mass (gravity).
The way I see it, with space being a vacuum, a body can drift unimpeeded & devoid of any exothermic radiation, so be at abs. zero. Gravitational attraction can take place and cause a tide pull on two bodies- still no friction. Then, crash & no more abs. zero.
In the case of electromagnetic radiation, only those electrons so affected to raise them out of dormancy would react. Depending on the amount of radiation would determine the depth of penetration and just how much heating of the body there is.
Question from me is how much energy is then required to raise a mass above abs. zero? Is it dependant on its mass to affect its latent heat or just its molecular weight, or energy levels of the atoms?
I hope I'm making sense!
Good proposition Red Baron.
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