All About Black Hole || How Universe Works in Urdu/ Hindi

Black Hole Complete Information in Urdu/ Hindi A black hole is a region of space from which nothing, including light, can escape. According to the general theory of relativity, it is the result of the curving of space time caused by being composed of dense mass. a black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of London City. The result is a gravitational field so strong that nothing, not even light, can escape. In recent years, NASA instruments have painted a new picture of these strange objects that are, to many, the most fascinating objects in space. Around a black hole there is a position of no return, called the event horizon. 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.

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