Hawking showed that quantum effects allow black holes to emit exact black body radiation, which is the average thermal radiation emitted by an idealized thermal source known as a black body. The electromagnetic radiation is as if it were emitted by a black body with a temperature that is inversely proportional to the black hole's mass.
With a little wizaedry using standard signal processing methods, I showed a maximum entropy Shannon channel is what the Black Body equation really is, right here. How about that!
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