Equation for the energy of Hawking Radiation

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The discussion focuses on the equation for the energy and frequency of Hawking radiation emitted from black holes. Participants seek a legitimate source that provides the derivation of this formula, expressing concerns about the credibility of some online references. Additionally, there is interest in understanding how far from the event horizon Hawking radiation is emitted. The Wikipedia link is mentioned as a potential resource for further information. Overall, the conversation highlights the need for reliable information on the physics of Hawking radiation.
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What is the equation for the energy/frequency of Hawking radiation emitted from a black hole?
Thank you in advance!

EDIT: I found this http://library.thinkquest.org/C007571/english/advance/core5.htm but the website doesn't seem to be a legitimate source and it doesn't give the derivation of the formula.

EDIT: Oh, and I would also like to know how far away from the event horizon is Hawking radiation emitted.
 
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