Question

short note on black hole​

Answer 1

Explanation:

A black hole is a region of space from which nothing can escape. According to the general theory of relativity, it is the result of the curving of spacetime caused by a huge mass. Around a black hole there is a position of no return, called the event horizon. ... A black hole is found by its interaction with matter..

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Answer 2

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A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.It is called "black" because it absorbs all the light that hits it, reflecting nothing, just like a perfect black body in thermodynamics. ... Under the theory of quantum mechanics black holes have a temperature and emit Hawking radiation, which makes them slowly get smaller.Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space. Scientists think supermassive black holes formed at the same time as the galaxy they are in.

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