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subhendu001
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If nothing can escape black hole(not even light), how can it radiate X-ray?
Typically it is not the actual black hole that produces the X-rays. It is usually caused by gas and dust orbiting at extremely fast speeds close to but outside of the event horizon in an accretion disk. Even so it is still possible for black holes to 'emit' radiation as Hawking Radiation.subhendu001 said:If nothing can escape black hole(not even light), how can it radiate X-ray?
Radiation from a black hole, also known as Hawking radiation, is a form of thermal radiation that is emitted by black holes. It is caused by quantum effects near the event horizon of the black hole, where particles and antiparticles are created and then separated, with one particle falling into the black hole and the other escaping as radiation.
Hawking radiation is different from other types of radiation because it is not caused by the usual processes of energy emission, such as nuclear fusion or radioactive decay. It is instead a result of the quantum effects near the black hole's event horizon.
No, it is not possible to directly observe radiation from a black hole. This is because the event horizon of a black hole is the point of no return for anything that crosses it, including light. However, the effects of Hawking radiation can be indirectly observed through its influence on the surrounding matter and energy.
No, Hawking radiation is not harmful to humans. The amount of radiation emitted by a black hole is extremely small, and it decreases as the black hole's mass decreases. Additionally, any Hawking radiation emitted by a black hole is also quickly absorbed by the surrounding matter and energy.
Yes, Hawking radiation can cause a black hole to evaporate over a very long period of time. As the black hole emits radiation, it loses mass and therefore its gravitational pull weakens. This process is very slow, and for most black holes, it would take trillions of years to evaporate completely.