Black holes?

Question

What is inside a black hole? suppose we flung a human being inside it, what would he/she see? ofcourse, the person wouldnt survive due to pressure, but if the person somehow survived wht would they see???

Answer 1

Very good question, which has no definite answer.

There are, however many theories about what exactly is inside a black hole. The most common of which is that a black hole is a singularity. A single point in spacetime that all vectors entering the black hole would lead to.

If this is the case, entering a black hole would be an interesting experience. As you cross the event horizon (the "surface" of the black hole), your body will be stretched. You will get much thinner and much taller. As you approach the singularity, your entire three dimensional space would be reduced to a single point. Every direction would be the same direction (if you tried to point up, you'd point in every direction concievable).

The interesting thing is what someone else would see as you enter the black hole. As you approach the event horizon you, yourself would cross, but the observer would not see that. He would see you get closer and closer to it, but never see you get there. Instead, you would seem to fade away, because less and less light would be reaching the observer, until you eventually vanished.

Hope this helps.

Answer 2

Contrary to popular superstition, singularities aren't the only things that can be surrounded by event horizons. Any distribution of matter that puts enough matter in a small enough place will produce an enclosing event horizon. The more matter is involved, the lower the average density within the volume can be.

Having said that, the amount of matter needed for a non-singularity black hole is very large.

R = GM/c^2
M = ρ V = ρ (4/3) pi R^3
R^3 = (3/4) M / (ρ pi) = G^3 M^3 / c^6
(3/4) c^6 = G^3 M^2 ρ pi
ρ = (3/4) c^6 / (G^3 M^2 pi)

ρ = (5.834E+80 kg^3 m^-3) / M^2

If the mass involved is 3 solar masses, the average density inside the Schwarzchild radius is 1.637E+19 kilograms per cubic meter. (This is a suspicious result because a neutron star is more dense than this: 2E+26 kg/m^3. I suspect that it might be invalid to use the usual volume-of-a-sphere formula for black holes.)

However, if the mass involved is 100,000,000,000 solar masses (approximately the mass of our galaxy), the average density inside the Schwarzchild radius is 0.01473 kilograms per cubic meter - only 1/80th of the density of the air at Earth's surface: easily doable with ordinary matter, without the need of a singularity.

The thing about this sort of black hole is that the weird stuff can only be seen from a distance. An astronaut falling into it won't be torn up by gravitational tides, as he would be for a singularity black hole. The astronaut might not notice in time that he's drifting into a no-return situation. He'd have to be somewhat alert to notice the gravitational frequency shift in the light from distant objects. If those object disappear entirely, he's in the hole for keeps.

Answer 3

A black hole is a mass of matter that has such a powerful gravitational pull that it pulls anything toward itself. A black hole is constantly, because of the forces involve, pulling everything amassed inside into a singularity, that is, all matter contained into the space smaller then a single atom. If a person survived the plunge, which to us would take moments, but to the person being compressed, that interval would take many years because of the distortion to the space/time continuum surrounding the black hole, then, since nothing can escape, not even light, he or she would see nothing. Primarily because the light that would be needed to reach their eyes would be pull into the center so there would be nothing that that person would be able to see.

Answer 4

A black hole is an object predicted by general relativity[1] with a gravitational field so strong that nothing can escape it — not even light.A black hole is defined to be a region of space-time where escape to the outside universe is impossible. The boundary of this region is a surface called the event horizon. This surface is not a physically tangible one, but merely a figurative concept of an imaginary boundary. Nothing can move from inside the event horizon to the outside, even briefly.

The existence of black holes in the universe is well supported by astronomical observation, particularly from studying X-ray emission from X-ray binaries and active galactic nuclei. It has also been hypothesized that black holes radiate energy due to quantum mechanical effects known as Hawking radiation.

Answer 5

There is nothing inside of a black hole. A person could not get there and you can not exist in nothing

Answer 6

they wouldn't be able to see anything. If the person managed not to be ripped apart molecule by molecule they wouldn't be able to see (less known breathe) because the gravitational pull is so strong inside of a black hole no light can escape. but if the person could see he/she would see everything that he hole had sucked into itself (thats my theory)

Answer 7

Most likely pitch black as not even light can escape from a black hole, but then again who knows?

Answer 8

Space and time as we know it are undefined inside a black hole. We have no way to know what is inside, nor a vocabulary to discuss it.

Answer 9

A black hole is a collapsed star so you might see what you might see in a massive star.

Answer 10

probably the same thing that they would see in white holes, or for that matter hispanic holes, just a different tint!