what are black holes?
Answers
Answer:
A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.[6] The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.[7][8] The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed.[9] In many ways, a black hole acts like an ideal black body, as it reflects no light.[10][11] Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass.
✭WHAT IS BLACK HOLE ?
A black hole is an object containing so much mass concentrated in a relatively small space that light cannot escape.
A black hole does not have a surface in the usual sense of the word. There is simply a region, or boundary, in space around a black hole beyond which we cannot see. This boundary is called the event horizon.
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✭DO BLACK HOLES GROW WHEN MATTER FALLS INTO THEM ?
Yes, the mass of the black hole increases by an amount equal to the amount of mass it captures.
Not all the matter around a black hole is doomed to fall into the black hole.
For example, in many black hole systems, some of the gas escapes as a hot wind that is blown away from the disk at high speeds.
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- If the Sun suddenly turned-into a black hole of the same-mass, we'd continue to orbit it without being pulled in.Of course, this still wouldn't be good for life on Earth!
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Factz :
Because of their very intense gravity will cause light to bend around them.
There is a black hole in our galaxy with a mass equal to four billion of our Suns.
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