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Q.

What is black whole ??

Asked by inquisitive, 29 Aug '12 06:06 pm
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1.

A black hole is a region of spacetime where gravity prevents anything, including light, from escaping.
Answered by LIPSIKA, 29 Aug '12 06:19 pm

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2.

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.
Answered by anantharaman, 29 Aug '12 06:15 pm

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3.

A black hole is a region of spacetime where gravity prevents anything, including light, from escaping.] The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Quantum mechanics predicts that black holes emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.
Answered by Psycho, 29 Aug '12 06:08 pm

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4.

A black hole is a region of spacetime where gravity prevents anything, including light, from escaping.] The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Quantum mechanics predicts that black holes emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.
Answered by Alok Khatore, 29 Aug '12 09:27 pm

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5.

A hole which is black..
Answered by sudhir dash, 29 Aug '12 06:44 pm

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