Showing posts with label PHYSICS. Show all posts
Showing posts with label PHYSICS. Show all posts
Thursday, August 21, 2014
Greatest Era in Human History - George Orwell vs. Michio Kaku
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Tuesday, October 26, 2010
Is the universe a big hologram? This device could find out
Scientists at Fermilab are constructing a 'holometer' to get a closer look at the fabric of spacetime.
Ian O'Neill
Christian Science Monitor
During the hunt for the predicted ripples in space-time — known as gravitational waves — physicists stumbled across a rather puzzling phenomenon. Last year, I reported about the findings of scientists using the GEO600 experiment in Germany. Although the hi-tech piece of kit hadn’t turned up evidence for the gravitational waves it was seeking, it did turn up a lot of noise.
Before we can understand what this “noise” is, we need to understand how equipment designed to look for the space-time ripples caused by collisions between black holes and supernova explosions.
Gravitational wave detectors are incredibly sensitive to the tiniest change in distance. For example, the GEO600 experiment can detect a fluctuation of an atomic radius over a distance from the Earth to the Sun. This is achieved by firing a laser down a 600 meter long tube where it is split, reflected and directed into an interferometer. The interferometer can detect the tiny phase shifts in the two beams of light predicted to occur should a gravitational wave pass through our local volume of space. This wave is theorized to slightly change the distance between physical objects. Should GEO600 detect a phase change, it could be indicative of a slight change in distance, thus the passage of a gravitational wave.
While looking out for a gravitational wave signal, scientists at GEO600 noticed something bizarre. There was inexplicable static in the results they were gathering. After canceling out all artificial sources of the noise, they called in the help of Fermilab’s Craig Hogan to see if his expertise of the quantum world help shed light on this anomalous noise. His response was as baffling as it was mind-blowing. “It looks like GEO600 is being buffeted by the microscopic quantum convulsions of space-time,” Hogan said.
Come again?
The signal being detected by GEO600 isn’t a noise source that’s been overlooked, Hogan believes GEO600 is seeing quantum fluctuations in the fabric of space-time itself. This is where things start to get a little freaky.
Read Full Article
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Christian Science Monitor
During the hunt for the predicted ripples in space-time — known as gravitational waves — physicists stumbled across a rather puzzling phenomenon. Last year, I reported about the findings of scientists using the GEO600 experiment in Germany. Although the hi-tech piece of kit hadn’t turned up evidence for the gravitational waves it was seeking, it did turn up a lot of noise.
Before we can understand what this “noise” is, we need to understand how equipment designed to look for the space-time ripples caused by collisions between black holes and supernova explosions.
Gravitational wave detectors are incredibly sensitive to the tiniest change in distance. For example, the GEO600 experiment can detect a fluctuation of an atomic radius over a distance from the Earth to the Sun. This is achieved by firing a laser down a 600 meter long tube where it is split, reflected and directed into an interferometer. The interferometer can detect the tiny phase shifts in the two beams of light predicted to occur should a gravitational wave pass through our local volume of space. This wave is theorized to slightly change the distance between physical objects. Should GEO600 detect a phase change, it could be indicative of a slight change in distance, thus the passage of a gravitational wave.
While looking out for a gravitational wave signal, scientists at GEO600 noticed something bizarre. There was inexplicable static in the results they were gathering. After canceling out all artificial sources of the noise, they called in the help of Fermilab’s Craig Hogan to see if his expertise of the quantum world help shed light on this anomalous noise. His response was as baffling as it was mind-blowing. “It looks like GEO600 is being buffeted by the microscopic quantum convulsions of space-time,” Hogan said.
Come again?
The signal being detected by GEO600 isn’t a noise source that’s been overlooked, Hogan believes GEO600 is seeing quantum fluctuations in the fabric of space-time itself. This is where things start to get a little freaky.
Read Full Article
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Live Superfoods
It is time to Wake Up! You too, can join the "Global Political Awakening"!Print this page
Friday, September 3, 2010
Hawking hasn't changed his mind about God
New Scientist (09-02-10)
Hold the front page: the big bang was an inevitable consequence of the laws of physics. Or indeed, as the front page of the London Times put it today: "Hawking: God did not create universe".
Media furore over Stephen Hawking's new book, The Grand Design
, has made it the biggest science news story of the day. But it's not like Hawking has suddenly given up a religious belief – let alone proved that God doesn't exist.
, has made it the biggest science news story of the day. But it's not like Hawking has suddenly given up a religious belief – let alone proved that God doesn't exist.Hawking's position on religion has remained unchanged since he wrote his bestseller, A Brief History of Time.
At the end of that book he famously used God as a metaphor for the laws of nature: "If we discover a complete theory, it would be the ultimate triumph of reason – for then we should know the mind of God."
At the end of that book he famously used God as a metaphor for the laws of nature: "If we discover a complete theory, it would be the ultimate triumph of reason – for then we should know the mind of God."This quotation is billed in The Times today as his "previous view" on religion. It was certainly influential – the book sold 6 million copies – but Hawking has always looked at God metaphorically, in much the same way, incidentally, as Einstein. "I cannot believe that God plays dice with the cosmos" was Einstein's famous quip about his discomfort with quantum mechanics. He also declared, "I want to know how God created the world."
But Einstein was not really religious. He remarked that "the idea of a personal God is an anthropological concept which I cannot take seriously". When asked if he believed in God, Einstein explained: "I believe in Spinoza's God who reveals himself in the orderly harmony of what exists, not in a God who concerns himself with fates and actions of human beings."
Dodging the inquisition
Likewise, in 2001 I interviewed Hawking and he made a telling remark underlining how he was not religious. He told me: "If you believe in science, like I do, you believe that there are certain laws that are always obeyed. If you like, you can say the laws are the work of God, but that is more a definition of God than a proof of his existence."
And in a piece by him that I edited in 2008, he described how he attended a conference on cosmology at the Vatican, where the pope told the delegates they should not inquire into the beginning of the universe itself, because that was the moment of creation and the work of God.
Hawking joked, "I was glad he didn't realise I had already presented a paper at the conference investigating precisely that issue: I didn't fancy the thought of being handed over to the inquisition like Galileo."
Silly season
As Hawking's long-suffering assistant dealt with a deluge of enquiries from journalists from around the world, she told me how the furore says more about the silly season than any change of mind. It also says much about how God is used to sell science to the public. The Higgs boson, labelled the "God particle" – a moniker that Peter Higgs himself finds embarrassing – springs to mind. And after all, The Times is serialising Hawking's book, which he wrote with Leonard Mlodinow.
In it, Hawking describes how M-theory, a candidate ultimate theory of everything, may offer answers to the question of creation. "According to M-theory, ours is not the only universe," Hawking writes. "Instead M-theory predicts that a great many universes were created out of nothing. Their creation does not require the intervention of some supernatural being or god."
The universe arises from scientific processes, not God – as Hawking himself would have agreed decades ago.Read Full Article
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