About Black Holes and other Dimensions?

Question

Ok, not sure how to phrase this... but..

I saw a program on string theory, and in that program, they mentioned this woman,,, something Randall. She believes that gravity is not a force from our dimention, and that it has leaked through from one of the others.

How do we know that black holes aren't actual openings into this dimention where gravity would be a strong force?

ok, sort of a p.s. here....

i realize that not only black holes have gravity. i assume that the theory includes that this effect only occurs where there is matter.

Answer 1

Well, we don't. However, the ability of mass to warp space-time isn't unique to black holes so while one might think of our four dimensional space inheriting a property from a higher dimensional space, it wouldn't be a local phenomenon to some object like a black hole. The idea of inheritance is a mathematical one - a space can induce properties on it subspaces and while that makes sense mathematically, we need to attribute a physical mechanism to it. Randall is referring to this property of inheritance or induction.

Answer 2

It's not at all hard to concoct some notion relating to something that's totally unsupported by the tiniest shred of hard, scientific evidence. Black holes offer just such an opportunity because science admittedly doesn't know precisely what goes on deep within one.

I'm not being critical of folks who put together those kinds of concepts, because there are plenty of instances in science where real knowledge has eventually emerged.

"...How do we know that black holes aren't actual openings into this dimention where gravity would be a strong force?..."
We don't *know* they're not..!

Answer 3

There are at least two kinds of gravity. One behaves similarly to the description you present as leaking out - this goes between stars, and is the predominant force in the universe. It resides within the Imaginary Universe (an old nickname for the primary parallel universe to our Real Universe), which is outside of our time.
The other is sourced in heavenly bodies, like our Sun and the planets. This form is the effect of the averaging of harmonics upon particles. The Sun's harmonics collide with the Earth, and since the Earth is less dense, it is easily held contiguous and continuous along its path.
It is really quite simple, but you must travel along a complicated path to see it. Modern physics studies does not discuss frequencies at the range of the Sun's fundamental & primary harmonics, which is why you are stuck with String Thought.
Oh, by the way, the Black Holes article defines the method used by Black Holes to maintain the conservation of energy between universes as matter transitions from outside of the event horizon to the inside.

Answer 4

How would she explain why all objects have their own gravity, not only black holes? You are probably referring to alternate universes rather than dimensions. There are supposed to be 11 dimensions, I believe. There are an infinite number of universes where everything that can possibly happen will happen.

Our minds cannot comprehend either one anyway. My head just blew up after reading the 2 previous responses.

Answer 5

In three spatial dimensions, it is a close relative of the quark-gluon plasma, the super-hot state of matter that hasn't existed since the tiniest fraction of a second after the big bang that started the universe. When viewed in 10 dimensions, the minimum number prescribed by what physicists call "string theory," it is a black hole.

No matter what you call it, though, that substance and others similar to it could be the most-perfect fluids in existence because they have ultra-low viscosity, or resistance to flow, said Dam Thanh Son, an associate physics professor in the Institute for Nuclear Theory at the University of Washington.

Son and two colleagues used a string theory method called the gauge/gravity duality to determine that a black hole in 10 dimensions -- or the holographic image of a black hole, a quark-gluon plasma, in three spatial dimensions -- behaves as if it has a viscosity near zero, the lowest yet measured.

It is easy to see the difference in viscosity between a jar of honey or molasses at room temperature and a glass of water. The honey is much thicker and more viscous, and it pours very slowly compared with the water.

Using string theory as a measuring tool, Son and colleagues Pavlo Kovtun of the University of California, Santa Barbara, and Andrei Starinets of the Perimeter Institute for Theoretical Physics in Waterloo, Ontario, have found that water is 400 times more viscous than black hole fluid having the same number of particles per cubic inch.

"One can 'stir up' the black hole, and it will wiggle for some time," Son said. "After awhile it comes back to rest in exactly the same way as when you have stirred a cup of water -- the water moves for awhile and then slows and stops. Viscosity is a reason why water stops. Similarly, one can associate viscosity with a black hole, and the viscosity is the reason it eventually stops moving after having been stirred."

A paper describing the use of string theory to compute black hole viscosity is scheduled for publication in the March 25 edition of Physical Review Letters, a journal of the American Physical Society. The work is supported by grants from the U.S. Department of Energy, the National Science Foundation and the Alfred P. Sloan Foundation.

Physicists for years have used string theory to unify forces of nature -- gravity and electromagnetism, for example -- when observations involving one force cannot be reconciled with those involving another force.

In string theory, elementary particles are described as small one-dimensional objects called strings, rather than simple points that do not occupy a dimension. But string theory requires at least six dimensions beyond the four in which humans traditionally think and function -- three spatial dimensions plus time, often referred to as space-time. Most of those extra dimensions are thought to be very tiny, yet they can have measurable effects on the other dimensions.

To be comparable to the quark-gluon plasma, a black hole's temperature should be about 2 trillion degrees Celsius. At such extreme heat, it is not surprising that it might evaporate like other liquids. That is exactly what happens to black holes in three spatial dimensions, according to a well-accepted theory of particle radiation from black holes by physicist Stephen Hawking.

But in the 10 dimensions of string theory, the fluid of a black hole isn't like other fluids. Space-time is considered to be flat in our perception, Son said, and five of the extra dimensions are compacted into a small, finite sphere. In the remaining dimension, however, space is curved. Evaporation doesn't occur in this dimension, he said, because as particles radiate from the fluid they strike the curved edge of the dimension and are sent bouncing back into the black hole.

While a black hole's extreme temperature, among other things, would make it a decidedly inhospitable place for humans, its extremely low viscosity would make swimming in it a breeze. But Son noted that the smaller an organism is, the more viscous a fluid would appear to be.

"For bacteria, swimming in water must be like humans trying to swim in honey," he said.

Answer 6

It's all theory and speculation. There's no proof either way.

Answer 7

ask Stephen Hawking.