His major contribution to the theory of black holes is that they will gradually evaporate, due to certain quantum effects close to the event horizon.
It is the strength of the gravitational attraction of the singularity which is the black hole.
Steven Hawking is probably the greatest theoretical physicists alive today. Especially when he has had to overcome enormous personal difficulties. See link below fora fuller description of his life and works
No he has a IQ of 150 and the best IQ score ever is 228 by a kid when he was 10 so that should prove he is smarter than Stephen Hawking. But Stephen Hawking is very smart in Science when it come to space and the Universe
He has been influenced to tell the world that he's an athiest and to say why
In fact, black holes cannot be directly viewed. They can only be located by seeing how much radiation is coming from a certain point in space. The black holes cannot be viewed directly because they absorb the electromagnetic radiation that goes near them.
because he just sits in a wheel chair with his mouth hanging open and does not move.
From what I know, Stephen Hawking can still move his eyes and one muscle under his right eye. So they put a kind of scrolling button which he can use to scroll through a computer and select the words he wants to say.
I would say Stephen Hawking is among the top 5, but im not sure for the rest of the people.
Black holes were stars that were so massive that they collapsed on itself. The gravity in black holes is infinite and more you get closer to it, more time gets slower. Black holes suck all matter that is too close. Even light can't escape Black holes.
While Hawking contributed significantly to our understanding of black holes, it might be better to say that black holes were a natural consequence and outgrowth of the general theory of relativity proposed by Einstein. Hawking proposed that black holes would interact thermodynamically with the universe in specific ways; for example that radiation could be generated by quantum effects near the event horizon (Hawking radiation) and thus carry mass away from it, per Einstein's proof of the equivalency of mass and energy; thus a black hole's mass could decrease over time and eventually it could "evaporate" entirely. The effect of this knowledge, and related knowledge, on society could potentially be deemed somewhat subjective.. (how does a larger understanding of the universe affect any particular society?) but at least, its effect could be comparable to the effects of other discoveries in astrophysics: often, discoveries simply lead to more questions which then demand further study and research.
yea-ish. Though what i can say is 'Black holes are invisible.'
The temperature of a black hole is extremely low, close to absolute zero. This low temperature affects its surroundings by causing it to absorb nearby matter and energy, creating a strong gravitational pull that can distort space and time around it.