I was just reading an article on black holes from scientific American, and they were talking about black holes and hawking radiation. But I was just wondering how is all of this possible?
I was just reading an article on black holes from scientific American, and they were talking about black holes and hawking radiation. But I was just wondering how is all of this possible?
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Really simply, when something has so much mass, the gravity from that mass becomes too powerful to be overcome by anything else and collapses.
The gravity is so strong that not even light can escape once it has entered its event horizon, thus the term black hole
if you stand on the earth and you throw a ball up in the air, it comes back down. however if you throw it hard enough, there is a velocity it can reach that it escapes earths gravitational pull.
if you stand on the moon and you throw a ball up in the air, it goes much higher before coming back down. however if you throw it hard enough, it could escape the moons gravitational pull.
if you stood on jupiter or the sun, it would be much more difficult to throw the ball because the gravity is much stronger. however there is still a velocity the ball could physically take to escape the gravitational pull.
where you have a black hole, you couldn’t possibly throw it fast enough for it to escape its gravity. even if you threw it at the speed of light, it wouldn’t escape the immense gravity. thus even light itself, does not escape a black hole. a black hole is a star that has such an intense gravitational pull that light doesn’t even escape.