How does a Black Hole die?

Benjamin Franklin said: "The only things certain in life are death and taxes." The most certain thing in life is that we will meet with death one day.


Black holes generally form when the center of a very massive star collapse in upon itself. This collapse makes a supermassive black hole and can also make supernovas or an exploding star.




Due to its strong gravity, no particles or even electromagnetic radiation such as light can escape from it! When a black hole consumes matter it increases its size, and mass, and the event horizon increases by 3 kilometers for every solar mass captured. If the black hole's mass is the same as the sun's mass will last up to 10^67 years which is equal to 10,000,000,000,000,000,000,000,000,000,000 ,000,000,000,000,000,000,000,000,000,000,0 00,000. It takes a lot of time to vanish a black hole from the universe but slowly black hole starts to evaporate, returning its energy to the universe.



Black holes survive by gobbling down the gas and stars around them. They are surrounded by accretion disks of material they've torn apart and sucked close, like water swirling down a drain. From time to time when material comes closer to the black hole it gets stored and revolves faster and faster around it. In between the dust friction show its character and generates heat which causes the accretion disk to glowing which outlines the shadow of the black hole and the event horizon also plays a major key in a black hole's death. As nothing can be escaped by them if they cross it the material will be lost forever as far as our current understanding of gravity dictates. But this so-called point of no return fails to take quantum mechanics into account. In 1974 Stephen Hawking proved that from a quantum perspective, escape from a black hole is possible although it is very slow.



When we see empty space it may seem devoid of energy but according to quantum mechanics, there are fluctuations in the energy over time as these fluctuations seem to be in pair of particles ( a particle and an antiparticle) which are present all over the universe because energy cannot be created from anything, one of the particles have positive and the other is negative. These pairs immediately destroy each other but if the particles appear at the boundary of a black hole's event horizon, it is possible that one of the particles with negative energy to fall into the black hole while the positive energy escapes. Then it seems that the black hole radiated the particle. According to Einstein's proposal, with his equation E=mc2 the fallen negative particle mass will be deducted from the black hole mass and make it shrink. "Exactly how long an individual black hole lives depends on strongly on its mass. The larger a black hole gets, the longer it takes to evaporate. In that sense (a black hole) can cheat death by growing ." - Doeleman says



As time passes the material near the black hole starts to run out. The black hole will start to shrink, as it loses mass, and the rate of particles escaping also increases until all the energy escapes at once. In the last second of black Hole's life, "you will have a huge flash of light and energy".






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