Speed of Light

Just read an interesting Discovery article that said scientists are baffled by high energy particles that are smashing (very infrequently) into the atmosphere and creating particle cascades. They even speculate that the source might be strings. Anyway, they said a number of scientists are arguing now that at high energies, the constancy of the speed of light might be challenged from all of this.

I know there are some cosmology gurus on this sight. Anybody read anything about this and know where I can learn more? It's an interesting topic (for those who enjoy such things) and I've never heard anything about it...
 
I suggest you read this book:

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Faster Than the Speed of Light: The Story of a Scientific Speculation
by Joao Magueijo, Jooao Magueijo
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Editorial Reviews
From Publishers Weekly
Could Einstein be wrong and Magueijo right?... Magueijo's heretical idea-that the speed of light is not constant; light traveled faster in the early universe-challenges the most fundamental tenet of modern physics. Deceptively simple, the theory came to the author during a bad hangover one damp morning in Cambridge, England (many of the author's breakthroughs seem to arrive at unexpected moments, like while he's urinating outside a Goan bar). If true, Magueijo's Variant Speed of Light theory, or VSL, rectifies apparent inconsistencies in the Big Bang theory. Magueijo cunningly frames his journey with the stories of other famous, courageous heretics, notably Einstein himself, and one suspects an apologetics at work here. Magueijo, a 35-year-old native of Portugal, is opinionated and can seem immature and almost bratty in his diatribes against the banalities of academia or the hypocrisy and backbiting of peer review. But his science is lucidly rendered, and even his penchant for sturm und drang sheds light on the tensions felt by scientists incubating new ideas. This book shows how science is done-and so easily can be undone.
Copyright 2002 Reed Business Information, Inc.

From Scientific American
Breaking the old speed limit posted by one Albert Einstein in his 20s, this book deploys a racy and provocative text to convey its popularized content of a new cosmology. Jocular, ironic, witty, self-centered, even indignant, Magueijo is all too ready to castigate his adversaries, those comfortable gatekeepers of learning. The author is no aspiring youth but a tenured professor of theoretical physics, age 35. In spite of his own stature within learned gates -- University of Lisbon, then Cambridge on a prime fellowship, now enjoying tenure at great Imperial College in London -- his voice is embittered. This journey of youthful success is recalled in complaint about the idiots, the sexually deficient, the money wasters. The thin volume is studded with familiar four-letter words, invoked with rude claims about the motives of colleagues, shadowy referees, editors and others encountered. Our current scenario for cosmology clearly opened its second act among the high simplicities of the 1970s with two visible puzzles. Why is 3-D cosmic space accurately flat (like old Euclid's own), although it lies within Einstein's universal 4-D curved spacetime? Why is its content so uniform on large scale? In 1980 Alan H. Guth of the Massachusetts Institute of Technology found a unitary explanation for both riddles. Named inflation, it postulates a minute interval of unusually sudden spatial expansion immediately before the slow, steady expansion of space carried all matter outward. That transient field eventually decayed to yield the complex mix of particles (including radiations) that still move through space. The early push is maintained in the Hubble expansion observably under way, now quite likely speeding up. This very cosmos was in fact described well before any of its complex contents were known. In 1918 Einstein and his friend the Dutch astronomer Willem de Sitter found the broad space and time properties we now believe. Inflation is the repulsive side of gravity's attraction, a kind of matter that stretches cosmic space so fast and far that almost every flaw has been ironed out to approximate local flatness. Our current particle physics allows such behavior, making such a surprise acceptable. Today we freely use what seemed unrealizable in those days. Nobody would have believed the account Einstein and de Sitter arrived at had it not fitted so neatly what we observe. Before and beyond all the starry galaxies, we see a distant uniform surface, the origin of almost all cosmic photons, pure thermal radiation with utter conformity to the established spectrum shape of old Max Planck's. The same temperature is seen at every point of the sky to better than one part in 100,000. Your coffee cream confirms: uniformity in fluids comes from stirring. It is easy to believe that those photons broke free of the expanding opaque plasma, to stream along while much slower action built the lumpy, gravitating assemblages we call galaxies. The time of that breakout was a rough half a million years after the inflationary flash. It is the minor deviations from simplicity that give us any early detail. For the past half a dozen years, the task has been to analyze all those minor flaws as hints of the earliest matter and of its changes and motions as our present cosmos grew. There are no new real puzzles, although certainly a great deal remains to be learned -- most importantly, the dark, enigmatic legacy of AE: his cosmological "constant." The book at hand is a People's Manifesto by an articulate and inventive opposition to the complacent consistency I have just expressed. The author and his colleagues are now skeptical of inflation: it is a tale much too pat, an expansion at unlimited speed. To stir the dense, hot mix in the early epochs, you have to race and beat light itself out to the remote boundaries of inflation. Faster than light? Einstein and his partner admitted only one way this could happen: with repulsive gravity. It is in their theory! Perhaps there is another way, suggests Magueijo. If matter in motion is too slow for light, why not make the speed of light faster and faster into the past? Throwing out heavyweight Einstein and his near constant speed of light is no easy task. Yet that is the burden of the new iconoclasts. Maybe they can make a cosmos with wildly varying speeds of light, and maybe they can keep the gas uniform, but they give no clear reward for so denying our well-tested Einstein on this theorist's journey into the past. Their strongest argument is the very flatness of space: it turns out that a cosmos with a changing speed of light must be a flat one and a uniform one as well, if energy is to be conserved. There is much more to be said about the untested physics of these variable vacuum light speeds. More than one form of theory is out there, to say nothing of the myriad options opened by multiple dimensions. Magueijo sums up with the view that the AE establishment "think they own us; we think ... they are just a bunch of squares.... We have all the fun in the universe." I hope my comments demonstrate that his last remark is wrong; there is fun with Einstein, too, plus plenty of impressive experimental support. As for the true prize, the grandeur of cosmology, neither the Academy nor its clever hecklers have yet grasped its origins.

Philip Morrison, professor of physics (emeritus) at the Massachusetts Institute of Technology, wrote the book reviews and the Wonders column for this magazine for 35 years.
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nitro
 
Interesting. I'll grab a copy. That article brings up something else I have wondered: in classic inflationary big bang theory, does the universe initially expand at a speed > c? From reading about it, I got the impression that it did or almost that they were not certain how it expanded so rapidly. (As you can tell, I'd love to see the speed of light barrier blown away.)
 
The concept of time and space and how they are actually related was amazingly difficult for me to understand. For instance, Einstein's Special Theory of Relativity and General Theory of Relativity state that time is independent to the observer.

Now, although light from the furthest reaches of our universe have taken billions of years to get here, from the proton's perspective, the trip has been instantaneous.

If you built a spaceship and were able to accelerate up to the speed of light, it would not take you millions of years to get to the next closest galaxy -- you would be there instantly. At the speed of light, there really is no real concept as "localized space." The faster you travel, the more you travel in time and the less you travel through space. However since space and time are closely related, it is only from our own perspective that things follow Newtonian physics. There is no such thing as Newtonian physics, but at our scale, that theory is good enough for everyday physics.

A lot of people don't know this fascinating stuff.

Next up -- Proton decay -- does it really happen?
 
Quote from aphexcoil:

The concept of time and space and how they are actually related was amazingly difficult for me to understand. For instance, Einstein's Special Theory of Relativity and General Theory of Relativity state that time is independent to the observer.

Now, although light from the furthest reaches of our universe have taken billions of years to get here, from the proton's perspective, the trip has been instantaneous.

If you built a spaceship and were able to accelerate up to the speed of light, it would not take you millions of years to get to the next closest galaxy -- you would be there instantly. At the speed of light, there really is no real concept as "localized space." The faster you travel, the more you travel in time and the less you travel through space. However since space and time are closely related, it is only from our own perspective that things follow Newtonian physics. There is no such thing as Newtonian physics, but at our scale, that theory is good enough for everyday physics.

A lot of people don't know this fascinating stuff.

Next up -- Proton decay -- does it really happen?
one of the best books i've ever read:
http://www.amazon.com/exec/obidos/tg/detail/-/0375708111/
 
Eureka! Scientists break speed of light

Jonathan Leake, Science Editor
Copyright 2000 Times Newspapers Ltd

SCIENTISTS claim they have broken the ultimate speed barrier: the speed of light.

In research carried out in the United States, particle physicists have shown that light pulses can be accelerated to up to 300 times their normal velocity of 186,000 miles per second.

The implications, like the speed, are mind-boggling. On one interpretation it means that light will arrive at its destination almost
before it has started its journey. In effect, it is leaping forward in time.

Exact details of the findings remain confidential because they have been submitted to Nature, the international scientific journal, for review prior to possible publication.

The work was carried out by Dr Lijun Wang, of the NEC research institute in Princeton, who transmitted a pulse of light towards a chamber filled with specially treated caesium gas.

Before the pulse had fully entered the chamber it had gone right through it and travelled a further 60ft across the laboratory. In effect it existed in two places at once, a phenomenon that Wang explains by saying it travelled 300 times faster than light.

The research is already causing controversy among physicists. What bothers them is that if light could travel forward in time it could carry information. This would breach one of the basic
principles in physics - causality, which says that a cause must come before an effect. It would also shatter Einstein's theory of relativity
since it depends in part on the speed of light being unbreachable.

This weekend Wang said he could not give details but confirmed: "Our light pulses did indeed travel faster than the accepted speed of
light. I hope it will give us a much better understanding of the nature of light and how it behaves."

Dr Raymond Chiao, professor of physics at the University of California at Berkeley, who is familiar with Wang's work, said he was
impressedby the findings. "This is a fascinating experiment," he said.

In Italy, another group of physicists has also succeeded in breaking the light speed barrier. In a newly published paper, physicists at the
Italian National Research Council described how they propagated microwaves at 25% above normal light speed. The group speculates that it could be possible to transmit information faster than light.

Dr Guenter Nimtz, of Cologne University, an expert in the field, agrees. He believes that information can be sent faster than light and
last week gave a paper describing how it could be done to a conference in Edinburgh. He believes, however, that this will not
breach the principle of causality because the time taken to interpret the signal would fritter away all the savings.

"The most likely application for this is not in time travel but in speeding up the way signals move through computer circuits," he said.

Wang's experiment is the latest and possibly the most important evidence that the physical world may not operate according to any of the accepted conventions.

In the new world that modern science is beginning to perceive, sub-atomic particles can apparently exist in two places at the same
time - making no distinction between space and time.

Separate experiments carried out by Chiao illustrate this. He showed that in certain circumstances photons - the particles of which light is made - could apparently jump between two points separated by a barrier in what appears to be zero time. The process, known as
tunnelling, has been used to make some of the most sensitive electron microscopes.

The implications of Wang's experiments will arouse fierce debate. Many will question whether his work can be interpreted as proving
that light can exceed its normal speed - suggesting that another mechanism may be at work.

Neil Turok, professor of mathematical physics at Cambridge University, said he awaited the details with interest, but added: "I doubt this will change our view of the fundamental laws of physics."

Wang emphasises that his experiments are relevant only to light and may not apply to other physical entities. But scientists are beginning to accept that man may eventually exploit some of these characteristics for inter-stellar space travel.

Rex
 
http://www.crystalinks.com/holographic.html

The Holographic Universe



The Universe as a Hologram
Author Unknown

In 1982 a remarkable event took place. At the University of Paris a research team led by physicist Alain Aspect performed what may turn out to be one of the most important experiments of the 20th century. You did not hear about it on the evening news. In fact, unless you are in the habit of reading scientific journals you probably have never even heard Aspect's name, though there are some who believe his discovery may change the face of science.

Aspect and his team discovered that under certain circumstances subatomic particles such as electrons are able to instantaneously communicate with each other regardless of the distance separating them. It doesn't matter whether they are 10 feet or 10 billion miles apart.

Somehow each particle always seems to know what the other is doing. The problem with this feat is that it violates Einstein's long-held tenet that no communication can travel faster than the speed of light. Since traveling faster than the speed of light is tantamount to breaking the time barrier, this daunting prospect has caused some physicists to try to come up with elaborate ways to explain away Aspect's findings. But it has inspired others to offer even more radical explanations.

University of London physicist David Bohm, for example, believes Aspect's findings imply that objective reality does not exist, that despite its apparent solidity the universe is at heart a phantasm, a gigantic and splendidly detailed hologram.

To understand why Bohm makes this startling assertion, one must first understand a little about holograms. A hologram is a three- dimensional photograph made with the aid of a laser.

To make a hologram, the object to be photographed is first bathed in the light of a laser beam. Then a second laser beam is bounced off the reflected light of the first and the resulting interference pattern (the area where the two laser beams commingle) is captured on film.

When the film is developed, it looks like a meaningless swirl of light and dark lines. But as soon as the developed film is illuminated by another laser beam, a three-dimensional image of the original object appears.

The three-dimensionality of such images is not the only remarkable characteristic of holograms. If a hologram of a rose is cut in half and then illuminated by a laser, each half will still be found to contain the entire image of the rose.

Indeed, even if the halves are divided again, each snippet of film will always be found to contain a smaller but intact version of the original image. Unlike normal photographs, every part of a hologram contains all the information possessed by the whole.

The "whole in every part" nature of a hologram provides us with an entirely new way of understanding organization and order. For most of its history, Western science has labored under the bias that the best way to understand a physical phenomenon, whether a frog or an atom, is to dissect it and study its respective parts.

A hologram teaches us that some things in the universe may not lend themselves to this approach. If we try to take apart something constructed holographically, we will not get the pieces of which it is made, we will only get smaller wholes.

This insight suggested to Bohm another way of understanding Aspect's discovery. Bohm believes the reason subatomic particles are able to remain in contact with one another regardless of the distance separating them is not because they are sending some sort of mysterious signal back and forth, but because their separateness is an illusion. He argues that at some deeper level of reality such particles are not individual entities, but are actually extensions of the same fundamental something.

To enable people to better visualize what he means, Bohm offers the following illustration.

Imagine an aquarium containing a fish. Imagine also that you are unable to see the aquarium directly and your knowledge about it and what it contains comes from two television cameras, one directed at the aquarium's front and the other directed at its side.

As you stare at the two television monitors, you might assume that the fish on each of the screens are separate entities. After all, because the cameras are set at different angles, each of the images will be slightly different. But as you continue to watch the two fish, you will eventually become aware that there is a certain relationship between them.

When one turns, the other also makes a slightly different but corresponding turn; when one faces the front, the other always faces toward the side. If you remain unaware of the full scope of the situation, you might even conclude that the fish must be instantaneously communicating with one another, but this is clearly not the case.

This, says Bohm, is precisely what is going on between the subatomic particles in Aspect's experiment.

According to Bohm, the apparent faster-than-light connection between subatomic particles is really telling us that there is a deeper level of reality we are not privy to, a more complex dimension beyond our own that is analogous to the aquarium. And, he adds, we view objects such as subatomic particles as separate from one another because we are seeing only a portion of their reality.

Such particles are not separate "parts", but facets of a deeper and more underlying unity that is ultimately as holographic and indivisible as the previously mentioned rose. And since everything in physical reality is comprised of these "eidolons", the universe is itself a projection, a hologram.

In addition to its phantomlike nature, such a universe would possess other rather startling features. If the apparent separateness of subatomic particles is illusory, it means that at a deeper level of reality all things in the universe are infinitely interconnected.

The electrons in a carbon atom in the human brain are connected to the subatomic particles that comprise every salmon that swims, every heart that beats, and every star that shimmers in the sky.

Everything interpenetrates everything, and although human nature may seek to categorize and pigeonhole and subdivide, the various phenomena of the universe, all apportionments are of necessity artificial and all of nature is ultimately a seamless web.
continues...
 
....continues

In a holographic universe, even time and space could no longer be viewed as fundamentals. Because concepts such as location break down in a universe in which nothing is truly separate from anything else, time and three-dimensional space, like the images of the fish on the TV monitors, would also have to be viewed as projections of this deeper order.

At its deeper level reality is a sort of superhologram in which the past, present, and future all exist simultaneously. This suggests that given the proper tools it might even be possible to someday reach into the superholographic level of reality and pluck out scenes from the long-forgotten past.

What else the superhologram contains is an open-ended question. Allowing, for the sake of argument, that the superhologram is the matrix that has given birth to everything in our universe, at the very least it contains every subatomic particle that has been or will be -- every configuration of matter and energy that is possible, from snowflakes to quasars, from bluü whales to gamma rays. It must be seen as a sort of cosmic storehouse of "All That Is."

Although Bohm concedes that we have no way of knowing what else might lie hidden in the superhologram, he does venture to say that we have no reason to assume it does not contain more. Or as he puts it, perhaps the superholographic level of reality is a "mere stage" beyond which lies "an infinity of further development".

Bohm is not the only researcher who has found evidence that the universe is a hologram. Working independently in the field of brain research, Standford neurophysiologist Karl Pribram has also become persuaded of the holographic nature of reality.

Pribram was drawn to the holographic model by the puzzle of how and where memories are stored in the brain. For decades numerous studies have shown that rather than being confined to a specific location, memories are dispersed throughout the brain.

In a series of landmark experiments in the 1920s, brain scientist Karl Lashley found that no matter what portion of a rat's brain he removed he was unable to eradicate its memory of how to perform complex tasks it had learned prior to surgery. The only problem was that no one was able to come up with a mechanism that might explain this curious "whole in every part" nature of memory storage.

Then in the 1960s Pribram encountered the concept of holography and realized he had found the explanation brain scientists had been looking for. Pribram believes memories are encoded not in neurons, or small groupings of neurons, but in patterns of nerve impulses that crisscross the entire brain in the same way that patterns of laser light interference crisscross the entire area of a piece of film containing a holographic image. In other words, Pribram believes the brain is itself a hologram.

Pribram's theory also explains how the human brain can store so many memories in so little space. It has been estimated that the human brain has the capacity to memorize something on the order of 10 billion bits of information during the average human lifetime (or roughly the same amount of information contained in five sets of the Encyclopaedia Britannica).

Similarly, it has been discovered that in addition to their other capabilities, holograms possess an astounding capacity for information storage--simply by changing the angle at which the two lasers strike a piece of photographic film, it is possible to record many different images on the same surface. It has been demonstrated that one cubic centimeter of film can hold as many as 10 billion bits of information.

Our uncanny ability to quickly retrieve whatever information we need from the enormous store of our memories becomes more understandable if the brain functions according to holographic principles. If a friend asks you to tell him what comes to mind when he says the word "zebra", you do not have to clumsily sort back through ome gigantic and cerebral alphabetic file to arrive at an answer. Instead, associations like "striped", "horselike", and "animal native to Africa" all pop into your head instantly.

Indeed, one of the most amazing things about the human thinking process is that every piece of information seems instantly cross- correlated with every other piece of information--another feature intrinsic to the hologram. Because every portion of a hologram is infinitely interconnected with ever other portion, it is perhaps nature's supreme example of a cross-correlated system.

The storage of memory is not the only neurophysiological puzzle that becomes more tractable in light of Pribram's holographic model of the brain. Another is how the brain is able to translate the avalanche of frequencies it receives via the senses (light frequencies, sound frequencies, and so on) into the concrete world of our perceptions. Encoding and decoding frequencies is precisely what a hologram does best. Just as a hologram functions as a sort of lens, a translating device able to convert an apparently meaningless blur of frequencies into a coherent image, Pribram believes the brain also comprises a lens and uses holographic principles to mathematically convert the frequencies it receives through he senses into the inner world of our perceptions.

An impressive body of evidence suggests that the brain uses holographic principles to perform its operations. Pribram's theory, in fact, has gained increasing support among neurophysiologists.

Argentinian-Italian researcher Hugo Zucarelli recently extended the holographic model into the world of acoustic phenomena. Puzzled by the fact that humans can locate the source of sounds without moving their heads, even if they only possess hearing in one ear, Zucarelli discovered that holographic principles can explain this ability.

Zucarelli has also developed the technology of holophonic sound, a recording technique able to reproduce acoustic situations with an almost uncanny realism.

Pribram's belief that our brains mathematically construct "hard" reality by relying on input from a frequency domain has also received a good deal of experimental support.

It has been found that each of our senses is sensitive to a much broader range of frequencies than was previously suspected.

Researchers have discovered, for instance, that our visual systems are sensitive to sound frequencies, that our sense of smell is in part dependent on what are now called "osmic frequencies", and that even the cells in our bodies are sensitive to a broad range of frequencies. Such findings suggest that it is only in the holographic domain of consciousness that such frequencies are sorted out and divided up into conventional perceptions.

But the most mind-boggling aspect of Pribram's holographic model of the brain is what happens when it is put together with Bohm's theory. For if the concreteness of the world is but a secondary reality and what is "there" is actually a holographic blur of frequencies, and if the brain is also a hologram and only selects some of the frequencies out of this blur and mathematically transforms them into sensory perceptions, what becomes of objective reality?

Put quite simply, it ceases to exist. As the religions of the East have long upheld, the material world is Maya, an illusion, and although we may think we are physical beings moving through a physical world, this too is an illusion.

We are really "receivers" floating through a kaleidoscopic sea of frequency, and what we extract from this sea and transmogrify into physical reality is but one channel from many extracted out of the superhologram.

This striking new picture of reality, the synthesis of Bohm and Pribram's views, has come to be called the holographic paradigm, and although many scientists have greeted it with skepticism, it has galvanized others. A small but growing group of researchers believe it may be the most accurate model of reality science has arrived at thus far. More than that, some believe it may solve some mysteries that have never before been explainable by science and even establish the paranormal as a part of nature.

Numerous researchers, including Bohm and Pribram, have noted that many para-psychological phenomena become much more understandable in terms of the holographic paradigm.

In a universe in which individual brains are actually indivisible portions of the greater hologram and everything is infinitely interconnected, telepathy may merely be the accessing of the holographic level.

It is obviously much easier to understand how information can travel from the mind of individual 'A' to that of individual 'B' at a far distance point and helps to understand a number of unsolved puzzles in psychology. In particular, Grof feels the holographic paradigm offers a model for understanding many of the baffling phenomena experienced by individuals during altered states of consciousness.
 
Something really odd to ponder: Before they used the cesium clocks in the measurement of the speed of light, the measurements showed a slowing over the years. It did not stabilize until they went with the atomic clocks. what if the atomic clocks and the speed of light are both slowing at the same rate?
 
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