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Ahhh .. there's a magic term .. 'blackbody'.
Interestingly, I've read that the Sun is a 'blackbody' … it radiates light, but it reflects none. As I understand it, this formally defines it to be a 'blackbody' !!
Also, black holes have a temperature. Presumably, they thus also radiate heat.
Is it the Hawking Radiation only which carries this heat ? (Separate from the accreting matter, that is)
Cheers
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