does time really"bend"when it passes through a black hole?

Question

i heard that suppose someone enters a black hole,it is assumed that time would slow down,the objest that's passing through will stretch and we'll reach another universe.is there any other theory? and what exactly is a "singularity".please recommend some books!

Answer 1

Impossible to answer in a short text, but the book you want to read to get a clearer picture is Stephen Hawking's 'A brief history of time'. It is not overly technical and is quite easy to grasp even for non physicists.

Answer 2

Black holes have got to be the craziest "objects" in our universe, and really any answer you get is just all theory, but I'll give it a try anyways:

A black hole can, in theory, have any mass. But the idea is that this mass is condensed to an extremely small space (infinitely small actually). Anyways, when someone (say person A) passes "into" a black hole (past the event horizon where light can no longer escape the gravitational field of the black hole), time actually keeps going on as normal for them. Their watch would keep ticking, a second would feel like a second, etc. However, if an observer (say person B) "outside" the black hole could see A's watch, B would see it moving slower. If A could see B's watch (which is outside the black hole), A would see B's watch moving faster.

So why is this the case?

To do this you must first understand that time is not a universal constant. What is "one second" for one person is not "one second" for someone else. Someone who is moving very fast (close to the speed of light) will time "one second" to be much much much slower than "one second" for someone standing still on Earth.

So as A gets close to the black hole, A begins accelerating very quickly since the gravitational field gets stronger. This causes A to start timing "one second" much slower due to special relativity, and eventually A will be moving so fast (assuming you someone survive the tidal forces that would rip ojects apart) that B would think that A's watch has stopped moving, or rather that time has stood still.

As for the "singularity", as I mentioned the mass of a black hole is condensed to an infinitely small space. To understand the singularity, you need General Relativity. Think of space as a 2-D sheet of rubber. If you put something with mass on the sheet, the rubber dips at that point. If you give it more mass, it dips more, and more and more, etc. So a black hole is so massive and so compressed that the rubber sheet actually dips to an infinite depth, essentially "ripping apart" space-time at an infinitely small volume. This hole in space-time is called a "singularity". I've never heard of being able to reach another universe by passing through a singularity, but that's next to impossible since tidal forces would rip apart any object that passes close enough to the singularity.

As for books..... This may sound weird but a introductory astronomy textbook with pictures is probably the best way to get a basic understanding of the concept. Having said that, I needed someone to explain both Special and General relativity to me for it to make sense, but afterwards the textbook made sense too.

Sry for the long answer!

Answer 3

Time is relative: Time measurement always depends on an observation point (an established baseline).

Some theories of time traveling had used the light speed as a reference, but that would be only in the imaging sector (traveling faster than light speed would allow a traveler (with proper equipment) to access images of the "past" as if they would be just occurring (as us when we look at the stars, we are watching them as they were X years ago).

And because now we know that black holes change the path of the light beams, some hypothesis had appeared trying to explain that not only light bends, but also time.

As far as we (our generations, our time) know, (and probably WILL know), black holes are mass eaters (aka, destructors). If something is attracted by a black hole, it will be absorbed by its gravity field. What happens later is a guess, and that's why we have several conjectures about it.

Gravitational singularity (aka, spacetime singularity): When you can't express a gravity field factor with numbers, you are forced to use the infinitum value. That is a singularity. Black holes (and the space around them where this phenomena occurs) are singularities, because their gravitational field cannot be measured.

Answer 4

A singularity represents a solution to Einstein's field equation.

The expert on What is called singularity or Blackhole is =Stephen Hawking. He wrote a few books on the subject. And they have the Best description of what a Blackhole means as a Singularity.
In Cosmological terms Russian cosmologists call a black hole, a "frozen Star".
So basically ,in simple terms a Black hole refers to a Star which no longer produces light. That means that it expanded all the mass radiation in Nuclear fusion. And now its mass is less than when it was an active Star.
The Earth would have similarities to a Black hole ,in the sense that it does not produce light to radiate into space ,its basically a space sponge that just soacks up light.

A Star like the Sun on the average is estimated to have a mass of about 1.987346218546790408 x 10^30 kilograms.
Sun a gravitational mass would produce around it a gravitational energy field of enough magnetude to alter the the direction of a light ray as it approaches its proximity. Gravity field by definition affects all mass interaction.

Therefore the particle mass of light obeys the same rules of Gravity just like any other mass structures.
Time like wise has time shell level s in space which inversely proportional to the Gravity pressure of space. Einstein called this differential gravity pressure in terms of a curvature of some sort of Space substance.When this substance is compressed it forms a curvature of space .

In the movie they called it space warps of time.
So a dead star just tries to get back the original mass that it has lost. It get this mass by soaking-in from the radiation of other Glaxies or neighboring Stars.
Time is a function of the GRavity space pressure and is dependent on the same rules of gravity that mass is subjected .
The futher away from the Gravitational mass the slower the time is. Similarly the longer the distance of interaction between two masses the weaker the gravity energy between them.

Answer 5

The gateway to another universe theory, while exotic and enticing is far from rational. Black holes or basically massive gravity wells who's mass is so great not even light can escape past its event horizon.

In other words, falling into a black hole would be like being compressed into a tiny speck, then eventually fused with the surrounding elements. Eventually the only trace of your existence will be in the form of X-rays projecting out at the poles.

I guess you could call that an alternate universe, but it is no way to live!

Answer 6

Time does not exist in a black hole. A singularity is a point with zero radius. If you want to buy a book that will answer most of your questions you should get a copy of,' The New Guide to Science,' by Isaac Asimov.

Answer 7

A black hollow is a area of area from which no longer something, inclusive of mild, can get away.if so how earth is get away from this??? around a black hollow there is an undetectable floor which marks the factor of no return, referred to as an experience horizon. it relatively is termed "black" with the aid of fact it absorbs each and all the sunshine that comes in direction of it, reflecting no longer something, purely like a pleasing black physique in thermodynamics.[a million] under the assumption of quantum mechanics black holes very own a temperature and emit Hawking radiation.

Answer 8

Time is linear, a single direction - present to past. The physics trilogy describes the basis of our reality, and it gives a clue as to why things operate as they do. The trilogy is: E = mc2, m = E/c2, and c2 = E/m. The last is that of a field of gravity, which is a field of physical time. This equation describes the "c^2" concept as being an energy/mass relationship, while the first two describe the basis of our existence itself is this very same value of "c2".

In the first equation the value of "c2" is the multiplier and in the second the divider. In each of these it is the basis of the equation itself. What this means is that all forms of energy and mass are composed of this value. Our universe and all within are composed of physical time "c2". It is for this reason the present moves into becoming the past at the rate it does, and this rate of change is the same throughout our universe. Every event moves from "present time" to that of the "past", which means our universe moves in a single direction.

Mass moving to the speed of light would change into electromagnetic energy. Mass would change from being a three dimensional entity into becoming that of physical time. This may be thought of as m = c^3, or a cube of time. A cube of time "c3", as I remember, is that of 1 kg. or 2.2 lbs.

Were all the mass of our universe converted into electromagnetic energy (of which it is composed), then it would have changed from a three dimensional universe into that of a single dimension. At that instant physical time would have ceased to exist, for it requires the presence of a mass to form the concept of time.

No matter were mass or energy exists in our universe, there can be no change it its passage from present to that of the past. Were this to actually happen, then whatever had a different "c" value would no longer exist in our universe.

Answer 9

OK, you have boggled my mind!

How can I even guess at an answer to such a wonderment that is contrived of so much speculation and guess work. Ask me after the millinimum and I 'may' have a better answer than now--but no promises'

Answer 10

I was on a bender last night in this black hole they call a town.