i wonder what would happen of someone would fall in a black hole. Where would he go and how will time and space be from his point of view.
maybe YOU have any idea?! just tell me anything you can!
sau_chitnis
Depends on the size. If it’s a small black hole then the difference in acceleration over parts of your body will very quickly tear you apart.
If it’s a huge black hole you wont feel much once you get inside until you near the singularity. In fact that journey may even take quite a long time. But once you get too close to the singularity you would very quickly be ripped apart and crushed into the singularity losing all information you carried in your body. All the hydrogen, oxygen, carbon and iron would all be destroyed.
Also as I understand it time will slow down for the person falling into the hole.
If you believe you have a soul, I’m not sure what any of the various religions say about it. They probably say they wont be affected by things like gravity.
Actually, that’s not quite correct. Time would seem normal to a person in a high gravity field - their time would appear slower from the outside. It would be impossible to tell what it would be like by going in - eventually you would reach the point where even light cannot escape (which is why it is a black hole) so the escape velocity from the black hole is faster than the speed of light so it would be impossible to get out.
mebbe time does slow down from outside. Since for someone who is out side the black holeand is watching you inside the black, time will be very fast. Its phsycological. you see, in a black hole due to xtreme gravity the speed by which things move with the gravity are extremely fast, faster than the speed of light(thats y light cant escape). So the person looking from outside will see the person inside travelling say 300000 kms in 1 second and his mind will assume the fact that time has speeden up and so the person inside the black hole is not covering the distance in 1 sec but over a long period of time that looks like 1 sec. The brain tells that time has speeden up since it cant believe the fact that one can travel such a vast distance in 1 sec.
So time will appear speeded up. ON the other hand, for the person inside the blackhole watching the outide person the opposite happens. Since he IS travveling at 300000/sec his mind cant believe that the person outside is travelling such a short distance in so much time and the brain tells that time has slowed down.
And Osiris, what exactly is singularity in a black hole?
Here is a FAQ on Falling into a Black Hole.
OK, suppose we’ve got a nice big black hole, like the one in the center of our Galaxy (small ones are dangerous from the tidal forces, so we’ll ignore them). We’ll also assume that there’s no other material around the hole: Black holes are often surrounded by accretion disks of very hot material, but that’s in no way necessary.
Anyway, I, being the curious type, jump in. You, safely on the outside, would see me head towards the event horizon (the point of no return)… and get really close to it… and get closer yet… But you would never quite see me cross it. Meanwhile, from your point of view, light from me would be getting redshifted to an ever-increasing degree, until I faded into the infrared and beyond, eventually going beyond any instruments you might have.
Meanwhile, what do I see? I’m pretty comfortable in my spaceship; since we specified a large black hole, tidal forces aren’t too big a deal. I see the black hole up ahead of me, and I’m falling into it at a normal rate. As I’m falling in, I do notice that all of the stars behind me are getting bluer, and all of a sudden, they flash into ultraviolet and beyond. At that moment, I pass through the event horizon… And after that point, nobody’s quite sure what I would see.
The time effects are not just psychological. Certainly, I’d be having a bit of an adrenaline rush if I were falling into a hole, with all sorts of possible implications on my consciousness, but my wristwatch will likewise disagree with yours, as will any other sort of time-measuring device I might have aboard.
No person outside of a black hole will be able to see anything inside the black hole.
Singularity? That’s pretty text book isn’t it? A singularity is a thing which has dimensions of a length, width and depth of exactly zero. In black holes these have a mass. Perhaps small perhaps incredibly huge. As I understand it mass collapses into a singularity by gravity overcoming the various other forces. E-M forces at the electron field. Strong and Weak at the surface of a neutron in a neutron star. Once those last two forces are overcome nothing exists to keep all the mass from collapsing into a singularity.
I’ve always been mildly curious how they know that there’s not some very odd things in black holes like a quark ball. But that might just be because there’s no force remaining to keep a quark ball stable.
Assuming the no accretion disk and a large enough black hole that the tidal forces are survivable:
According to the current theories, nothing would happen once you cross the even horizon. (the boundary at which the orbital velocity is exactly equal to c)
When I say nothing, I mean NOTHING. Time would completely stop for you. It is unclear how you would ever actually reach the singularity.
However, physics admits they don’t really know. About that point in the whole mental excercise, bad things start happening to the best of the formulas that describe things. Such as values going to infinite values or zero. Essentially, the formulas quit working. The implied message is that time would stop.
That doesn’t sound right. I think what you are describing is what an observer would see if he stopped at the horizon, but you cannot stop. I read an article in Scientific American that described what an observer would see. There is a sphere where light would orbit the hole. When you reach it the sphere would appear to be a plane; the outside universe on one side. As you continue to fall, it would appear that you were outside the sphere and the outside universe would be inside the sphere.
scotth
Time stops at the horizon for an outside observer, but for an in-falling observer nothing too strange happens at the horizon. However time ends (rather than stops) at the singularity.
No, time doesn’t stop for the person falling through the event horizon. From the site Perderabo gave the link to (bolding mine):
And, of course,when in doubt, go to the Straight Dope Archives and search for what Cecil has to say:
What would happen if you were swallowed by a black hole?
… or go to the sci.physics Physics and Relativity FAQ: http://math.ucr.edu/home/baez/physics/