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Date: 1991 


Question:
How come the radiation Hawking describes is unidentifiable? Is the matter that slowly appears just outside the event horizon from within the hole, or are these particle pairs being created arbitrarily?



Replies:
Yes, of course, anything that is "radiated from" a black hole must come from outside of the event horizon. As far as the last part of your question is concerned, my dictionary gives "random" as one definition of the word "arbitrary". When you study quantum mechanics you will learn that single events, like the radiation of a quantum of light by an atom, are nearly always random.



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