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Suppose black holes radiate their mass away and the

Chapter 34, Problem 17

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QUESTION:

Problem 17CQ

Suppose black holes radiate their mass away and the lifetime of a black hole created by a supernova is about 1067 years. How does this lifetime compare with the accepted age of the universe? Is it surprising that we do not observe the predicted characteristic radiation?

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QUESTION:

Problem 17CQ

Suppose black holes radiate their mass away and the lifetime of a black hole created by a supernova is about 1067 years. How does this lifetime compare with the accepted age of the universe? Is it surprising that we do not observe the predicted characteristic radiation?

ANSWER:

Solution 17CQ

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The accepted age of universe is about 14billion years. The lifetime of a black hole created by a supernova is 1067 years which very large as compared to the life of universe.

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