"Are Black Holes Actually White?" Dartmouth Team Seeks to Validate Stephen Hawking's Theory
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August 24, 2009

"Are Black Holes Actually White?" Dartmouth Team Seeks to Validate Stephen Hawking's Theory

Stephen_hawking3 Stephen Hawkings great discovery was that the mysterious regions in space we call black holes radiate heat through quantum effects. Hawking has said that "black holes are not really black after all: they glow like a hot body, and the smaller they are, the more they glow." Hawking's famous theory says that the temperature of a black hole varies inversely to its mass. The mathematician Louis Crane proposed a scifi-like scenario back in 1994 that billions of years in the future, after all the stars have burned out, that small black holes could be created to generate heat and guarantee survival of the species.

Meanwhile, up in Hanover, New Hampshire a bold team of researchers at Dartmouth College propose a new way of creating a reproduction black hole in the laboratory on a much-tinier scale than their celestial counterparts. The new method to create a tiny quantum sized black hole would allow researchers to better understand what physicist Stephen Hawking proposed more than 35 years ago: black holes are not totally void of activity; they emit photons, which is now known as Hawking radiation.

"Hawking famously showed that black holes radiate energy according to a thermal spectrum," said Paul Nation, an author on the paper and a graduate student at Dartmouth. "His calculations relied on assumptions about the physics of ultra-high energies and quantum gravity. Because we can't yet take measurements from real black holes, we need a way to recreate this phenomenon in the lab in order to study it, to validate it."

The researchers showed that a magnetic field-pulsed microwave transmission line containing an array of superconducting quantum interference devices, or SQUIDs, not only reproduces physics analogous to that of a radiating black hole, but does so in a system where the high energy and quantum mechanical properties are well understood and can be directly controlled in the laboratory.

"We can also manipulate the strength of the applied magnetic field so that the SQUID array can be used to probe black hole radiation beyond what was considered by Hawking," said Miles Blencowe, another author on the paper and a professor of physics and astronomy at Dartmouth.

"In addition to being able to study analogue quantum gravity effects, the new, SQUID-based proposal may be a more straightforward method to detect the Hawking radiation," says Blencowe.

In a paper published in the August 20 issue of Physical Review Letters, the flagship journal of the American Physical Society

Posted by Casey Kazan.

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Source: http://www.dartmouth.edu/~news/releases/2009/08/21a.html

Comments

Very good read. I can't wait for more research to be done.

Here's some things that they won't be able to do though.
http://concretelyambiguous.com/i-told-you-so/bet-you-cant-do-this-too/

Great job. This is one of the easiest and most informing scientific articles I've ever read.

I thought blackhole's were so massive that even light couldn't escape their grasps. Is this not true?

Electronic Cigarette

I saw on the Science channel that Hawking found that when two protons are at the event horizon of a black hole that the negatively charged proton gets gobbles up into the hole and the positively charged proton escapes as radiation. This radiation is the only thing that can escape the black hole...they think.

This post is great!
But what changes whether we know or not the color of black holes?
Unless it is an issue something like proving the existence of Higgss particle!!
Anyway, this blog is great!!

White or black is not about color its about whether the object is net drawing in or emitting matter. Some think that there are parallel universes where the stuff that goes into a black hole in one universe will dump out from a white hole in another universe. Also worm hole theory uses this concept.

Knowing the "color" of an um.. hole seems to be important in answering the information paradox.

I thought that colour is a figment of the mind rather like Q. particles and consequently the Higgs Bosun which will only exist when there is an understanding of the need for its existence. Anyway the colour of a black hole is immaterial if you could use it as a plastic waste disposal unit. One colour suits all.

JUST DIFFERENT GALAXY STAGES.

Galaxies can generally be described in to stages: Galaxies with a movement inwards to the center and galaxies with a movement outwards from the center, creating different views of the center.

The difference between the 2 types can especially be observed by some galaxies that have the barred structure and those without. Barred galaxies have an outgoing movement as in the Milky Way galaxy.

Our Milky Way Galaxy is an outgoing movement galaxy. That is: There is NO inwards suction as in "black holes" but an outgoing pushing force of creation - still forming new Stars in the middle from where they later on will be pushed out in the Milky Way arms.

That is: The gravitational movement goes both ways in galaxies. And therefore the laws of gravity have to be seriously considered and changed.

Natural Philosophy
www.native-science.net and
www.cosmology-unified.net

@Ivar
The gigantic black hole in the center of Milky Way is called 'Sagittarius A1' . IT kept this galaxy united for some 10Billion years (or more) and it is far away from vanishing in a blu smoke of pipe.......or philosopy.

@Casey : very good and interesting article , a good job.

I am little uncertain and skeptic on HOW these scientists plan to emulate a Black hole in a LAB.

About the colour : I agree with some comments above ....what hell of a color are they talking about ?????

Black holes are color-less and are damned dangerous to nearby objects including stars and planets....then if matter and antimatter dance at the events horizon escaped by the singularity prove the tremendous gravity and that some radiations and some elusive particles (including those mass-less) escape the tremendous gravity force.

On the other end as black holes swallow a lot of matter of any kind...would this matter disappear in the singularity ?????

NOT at all.

Some radiations and some mass-less fancy particles escape and are the proof that the mass swallowed is NOT disappeared in a blu smoke of pipe....it stays there in some 'strange form'.

Regards to Sagittarius A1.

procol harum says white but pale - go figure.

@Caroline:

You clearly have *no* grasp on reality beyond your pipe...

First, yes there are different types of galaxies, but No, they ALL have gravity, all are constantly forming stars.

There is no "outward gravity". Centripetal force from rotation pushes stuff out.

As nice as it my be to think of things as simple 'creation vs destruction', but, yeah, you are way off. Star death leads to birth of other stars, and although the tidal effects of black holes can rip stars apart, they can also cause interactions that form huge star clusters and maybe even eventually conditions for life...

start learning:
http://en.wikipedia.org/wiki/Galaxies
http://en.wikipedia.org/wiki/Spiral_galaxy

My brain hurts from reading all that.

First of all, stars have been measured to orbit at millions of miles per hour as they are drawn in to a black hole. With our eyes, you would see a very bright blur around the black hole. Think of watching a movie. At 30 frames per second, your eye sees continuous motion because it is not fast enough to catch the individual frames. As stars are zipping around the black hole in all directions, you would see a big bright blur.

Secondly, time stops at the event horizon, so the star would appear as a bright spot on the surface as it was drawn in. As many stars are drawn in from all directions, their images would be superimposed on the surface, so the black hole would appear white.

Also, because of the Heisenberg uncertainty principle, a photon's position and momentum cannot simultaneously be known to arbitrary precision. So when time stops and a photon stops at the event horizon, its momentum would be zero. Therefore, we are uncertain about its position whether it is inside or outside the event horizon. So you can kind of say it is both inside AND outside. Again you get white!

So don't look at a black hole without sunglasses - you'll burn your eyes out laddie!

I am little uncertain and skeptic on HOW these scientists plan to emulate a Black hole in a LAB. I think Black holes are color-less and are damned dangerous to nearby objects including stars and planets.

I thought that colour is a figment of the mind rather like Q. particles and consequently the Higgs Bosun which will only exist when there is an understanding of the need for its existence. Anyway the colour of a black hole is immaterial if you could use it as a plastic waste disposal unit. One colour suits all.

White holes appear in the theory of eternal black holes. ... but objects falling towards a white hole would never actually reach the white hole's event horizon ... This implies that black holes and white holes are the same object.

sorry for that im just reall exsited to learn about black holes stephen hawking is so awesome im doing a inquiry project and i got an a on it my topic was black holes!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


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