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Science/Tech
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Title: Physics laws flawed (Dr Michael Murphy is part of a team that has, over recent years, uncovered surprising and controversial evidence suggesting the laws of physics may have been changing through cosmic time. )
Source: [None]
URL Source: http://www.sciencealert.com.au/news/20071012-16699-2.html
Published: Dec 13, 2007
Author: n
Post Date: 2007-12-13 11:26:08 by gengis gandhi
Keywords: None
Views: 2257
Comments: 89

Physics laws flawed E-mail to a Friend Monday, 10 December 2007 Swinburne University

A Swinburne astrophysicist has leapt another hurdle in the path to proving that our fundamental theories of physics are not what they seem.

Dr Michael Murphy is part of a team that has, over recent years, uncovered surprising and controversial evidence suggesting the laws of physics may have been changing through cosmic time. In this latest move, Murphy has debunked a study which claimed to disprove his findings.

Murphy’s research into the laws of Nature goes back eight years, and concerns our understanding of electromagnetism, the force of nature that determines the sounds we hear, the light we see, and how atoms are held together to form solids. Through the study of electromagnetism in galaxies ten billion light years away, he has challenged the fundamental assumption that the strength of electromagnetism has been constant through time.

“Back in 2001 we published evidence showing a small change in the fine structure constant, the number that physicists use to characterise the strength of electromagnetism,” Murphy said.

“Even though the change that we think we see in the data is quite small, about five parts in a million, it would be enough to demonstrate that our current understanding must in fact be wrong. It’s an important discovery if correct. It suggests to physicists that there’s an underlying set of theories we’re yet to broach and understand.”

Physicists have been chasing results like these for a number of years, but since 1999, Murphy and his co-researchers have been ahead of the pack. They’ve published a series of observations from the Keck Telescope in Hawaii as further evidence of a varying fine structure constant. But, a few years ago, another research team claimed that data from a different telescope contradicted Murphy’s observations.

However, he’s been able to prove that the contradictory work itself was flawed. “We’ve shown that the way the data was analysed was faulty,” he said. “Their procedures were faulty so the numbers that came out are meaningless. Our paper points this out. When you replicate their analysis and fix their problems, you get a very very different answer indeed.”

Murphy has a ‘comment’ about this latest work in this week's issue of the journal Physical Review Letters. It’s the most difficult journal for physicists to get published in, and is the one they turn to for important results in their field.

This latest step is not the end of the road though in convincing scientists across the world that they need to rethink their ideas about electromagnetism. Even though this study also produced results that agree with his initial Keck findings, Murphy said there’s still work to be done.

“There are some problems that need addressing,” he said. “It’s quite a surprising result and one that probably many people need a lot more convincing on. It will take some time, but we’re doing that job.”

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Begin Trace Mode for Comment # 89.

#81. To: gengis gandhi (#0)

The spin profiles of galaxies are flat, meaning galaxies apparently spin like a wheel, not like a collection of corks going down a drain. The wheel-like synchronism of galactic spinning is, I will suppose for the moment, has some sort of quantum gravity wave origin. Supposing the core dominates the shape of the gravity wave and the core is spinning, the resulting gravity waves apparently act like the spokes of a wheel in generating the motion of the surrounding matter. That's about all I can think of on that at the moment.

nobody  posted on  2008-02-03   3:06:59 ET  Reply   Untrace   Trace   Private Reply  


#88. To: All (#81) (Edited)

Spinning galaxies don't spin like a wheel after a certain radius the radial speed become flat (constant), but they're more wheel-like than expected from estimating mass by starlight, as if there is dark matter mixed in with the stars further out. My guess is the matter gets channelled, much like rain to a river, by quantum gravity potential wells generated from the center. A spiral river would have a constant velocity in the radial direction.

nobody  posted on  2008-06-07   19:02:17 ET  Reply   Untrace   Trace   Private Reply  


#89. To: All (#88)

Are the stars in the paired arms of a spiral galaxy like the sparks shed from a pinwheel or are they like two glowing schools of fish drawn into a whirlpool?

My sense of things favors the pinwheel. Classical gravity favors something whirlpool- like, I suppose, at least based on how scientists apparently look at galactic spin profiles and suggest galaxies should spin much slower at the perimeter.

In any case, the symmetry of paired arms is usually explained (but not simulated using classical gravity very realistically, in my opinion) with a collision scenario. But, from my observations, there's typically a rather empty "sweep-out" zone of sorts about half-way to the center in many spiral galaxies, and that's where useful quantum gravity concepts come into play, I think. The spiral arms themselves are often made of loose spirals. Rather than a center like a pinwheel's paired source of sparks I see a spinning center stretching outward, reaching out to the sweep-out accreted ring's well and partly spilling over into it, with the spillage then spiralling around within the well while ripping it apart at the same time. Then the center can restabilize to a more compact form as a result of losing mass at the extremes, which would help repair the sweep-out zone.

nobody  posted on  2008-06-14   1:17:21 ET  Reply   Untrace   Trace   Private Reply  


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