March 25, 2014
Mohenjo
Science
amazon, “theory of everything, Big Bang, business, Business News, cosmic microwave background, einstein general relativity, Extreme Physics, General Relativity, gravitational waves, Hotels, huffingtonpost, human-rights, medicine, mental-health, New Physics, Physics, research, Science, Science News, Space, Speed Of Light, technology, Technology News, the Big Bang, the universe, travel, Universe, vacation
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The discovery that the universe really did expand at many times the speed of light immediately after the Big Bang should bring physicists slightly closer to their ultimate goal — the long-sought “Theory of Everything.”
On Monday (March 17), researchers announced that they had detected the signature of gravitational waves in the cosmic microwave background, the ancient light that began pervading the universe 380,000 years after the Big Bang.
If it holds up, the landmark find confirms the theory of inflation, which posits that the cosmos exploded from mere quantum fluctuations into something of macroscopic size just a few tiny fractions of a second after its birth. [How Inflation Gave the Universe the Ultimate Kickstart (Infographic)]
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The bottom part of this illustration shows the scale of the universe versus time. Specific events are shown such as the formation of neutral Hydrogen at 380 000 years after the big bang. Prior to this time, the constant interaction between matter (electrons) and light (photons) made the universe opaque. After this time, the photons we now call the CMB started streaming freely.
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July 9, 2013
Mohenjo
Science
amazon, “theory of everything, ”, business, climate, Einstein’s general relativity, fundamental particles, General Relativity, Hotels, imperial college london, mindbendingly large, particle accelerators, Physical Review Letters, quantum entanglement, quantum mechanics, research, Science, Science News, Stanford University, String Theory, technology, Technology News, theoretical physicist, travel, uantum mechanics, vacation, vanishingly small, vibrating strings, wired
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The theory has long been touted as the best hope for a unified “theory of everything,” bringing together the physics of the vanishingly small and the mindbendingly large. But it has also been criticized and even ridiculed for failing to make any predictions that could be checked experimentally. It’s not just that we don’t have big enough particle accelerators or powerful enough computers; string theory’s most vocal critics charge that no experiment could even be imagined that would prove it right or wrong, making the whole theory effectively useless.
Now, physicists at Imperial College London and Stanford University have found a way to make string theory useful, not for a theory of everything, but for quantum entanglement.
“We can use string theory to solve problems in a different area of physics,” said theoretical physicist Michael Duff of Imperial College London. “In that context it’s actually useful: We can make statements which you could in principle check by experiment.” Duff and his colleagues describe their findings in a paper in Physical Review Letters September 2.
String theory suggests that matter can be broken down beyond electrons and quarks into tiny loops of vibrating strings. Those strings move and vibrate at different frequencies, giving particles distinctive properties like mass and charge. This strange idea could unite all the fundamental forces, explain the origins of fundamental particles and connect Einstein’s general relativity to quantum mechanics. But to do so, the theory requires six extra dimensions of space and time curled up inside the four that we’re used to.
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http://www.wired.com/wiredscience/2010/09/stringy-quantum/
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May 16, 2013
Mohenjo
Science
amazon, aviation, business, creator gene roddenberry, Environment, Faster Than Light, Faster Than Light Travel, Future, gaming, General Relativity, Hotels, huffingtonpost, human-rights, mass energy equivalence, Physics, research, Science, Science News, Slideshow, Star Trek, Star Trek Warp Drive, technology, Technology News, transportation, travel, U.S.S. Enterprise, vacation, Video, videogames, Warp Drive, Warp Speed
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In the “Star Trek” TV shows and films, the U.S.S. Enterprise’s warp engine allows the ship to move faster than light, an ability that is, as Spock would say, “highly illogical.”
However, there’s a loophole in Einstein’s general theory of relativity that could allow a ship to traverse vast distances in less time than it would take light. The trick? It’s not the starship that’s moving — it’s the space around it.
In fact, scientists at NASA are right now working on the first practical field test toward proving the possibility of warp drives and faster-than-light travel. Maybe the warp drive on “Star Trek” is possible after all. [See also: Warp Drive: Can It Be Done? (Video)]
According to Einstein’s theory, an object with mass cannot go as fast or faster than the speed of light. The original “Star Trek” series ignored this “universal speed limit” in favor of a ship that could zip around the galaxy in a matter of days instead of decades. They tried to explain the ship’s faster-than-light capabilities by powering the warp engine with a “matter-antimatter” engine. Antimatter was a popular field of study in the 1960s, when creator Gene Roddenberry was first writing the series. When matter and antimatter collide, their mass is converted to kinetic energy in keeping with Einstein’s mass-energy equivalence formula, E=mc2.
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In the “Star Trek” TV shows and films, the U.S.S. Enterprise’s warp engine allows the ship to move faster than light, an ability that is, as Spock would say, “highly illogical.” However, there’s a loophole in Einstein’s general theory of relativity that could allow a ship to traverse vast distances in less time than it would take light.
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.Click link below for story, slideshow, and video:
http://www.huffingtonpost.com/2013/05/14/warp-drive-possible-star-trek-special-relativity_n_3273422.html?ref=topbar
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May 9, 2013
Mohenjo
Science
Albert Einstein, amazon, Astrophysics, black holes, business, Calif, Carnegie Institution for Science, climate, Cosmology, Einstein, einstein general relativity, Future, gadgets, General Relativity, general relativity theory, general theory of relativity, gravitational waves, gravity, Gravity Waves, Hotels, huffingtonpost, Mansi M. Kasliwal, Pasadena, Physics, research, Science, Science News, Slideshow, Space, technology, Technology News, theory of relativity, travel, vacation, Video
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In the next five years or so, scientists are poised to discover proof that space and time can wrinkle in the form of gravitational waves. These waves were predicted almost 100 years ago by Albert Einstein’s general theory of relativity, but have yet to be seen.
That could change soon when the latest, most sensitive experiments hunting gravitational waves come online. “There’s so much activity and excitement in the field right now,” said Mansi M. Kasliwal, an astronomer at the Observatories of the Carnegie Institution for Science in Pasadena, Calif. “The momentum is really building.”
Kasliwal is the author of a paper published online today (May 2) in the journal Science describing the burgeoning field of gravitational wave studies.
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3D visualization of gravitational waves produced by two orbiting black holes.
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.Click link below for story, slideshow, and video:
http://www.huffingtonpost.com/2013/05/03/gravity-waves-found-einstein-general-relativity-theory_n_3203364.html?ref=topbar
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James' World 2 