> There have been paints that radiate back more than they receive for decades. <
Then where does that additional radiant energy come from? That’s the part I just don’t get.
I didn't quite get it either, which left Bill kinda frustrated with me. But it has to be extracting heat from the substrate. Exactly how that happens is still a mystery to me. Quantum mechanics or something. I'm just an ancient, retired, dirty-fingernail machine tool engineer.