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• ### Do Gravitational Waves Exhibit Wave-Particle Duality?

02/24/2016 5:53:58 PM PST · by MtnClimber · 34 replies
Forbes/Science ^ | 20 Feb. 2016 | Ethan Siegel
Now that LIGO has detected their first gravitational wave signal, the part of Einstein's theory that predicts that the fabric of space itself should have ripples and waves in it has been confirmed. This brings up all sorts of interesting questions, including this one from reader (and Patreon supporter!) Joe Latone, who asks: "Are gravity waves expected to exhibit wave-particle duality, and if so, have LIGO physicists already conceived of ways to test it, like the double-slit experiment?" It started out simply enough: matter was made of particles, things like atoms and their constituents, and radiation was made of waves....
• ### Pondering Gravitational Waves

02/13/2016 5:52:10 AM PST · by LibWhacker · 25 replies
Centauri Dreams ^ | 2/11/16 | Paul Gilster
Pondering Gravitational Wavesby Paul Gilster on February 11, 2016 "Einstein would be beaming," said National Science Foundation director France CÃ³rdova as she began this morning's news conference announcing the discovery of gravitational waves. I can hardly disagree, because we have in this discovery yet another confirmation of the reality of General Relativity. Caltech's Kip Thorne, who discussed black hole mergers way back in 1994 in his book Black Holes and Time Warps, said at the same news conference that Einstein must have been frustrated by the lack of available technologies to detect the gravitational waves his theory predicted, a lack...
• ### Einstein's gravitational waves 'seen' from black holes

02/11/2016 9:49:13 AM PST · by jpsb · 40 replies
BBC ^ | Fed 11, 2016 | Pallab Ghosh
Scientists are claiming a stunning discovery in their quest to fully understand gravity.
• ### Gravitational wave rumors ripple through science world

01/12/2016 9:00:15 PM PST · by BenLurkin · 87 replies
spacedaily.com ^ | 01/12/2016
There has been no announcement, no peer review or publication of the findings - all typically important steps in the process of releasing reliable and verifiable scientific research. Instead, a message on Twitter from an Arizona State University cosmologist, Lawrence Krauss, has sparked a firestorm of speculation and excitement. Krauss does not work with the Advanced Laser Interferometer Gravitational Wave Observatory, or LIGO, which is searching for ripples in the fabric of space and time. But he tweeted on Monday about the apparent shoring up of rumor he'd heard some months ago, that LIGO scientists were writing up a paper...
• ### Gaza ENT Doctor Challenges Einstein's Relativity Theory, States: People in Gaza Have the...

12/30/2015 4:42:15 PM PST · by DeoVindiceSicSemperTyrannis · 44 replies
MEMRI TV ^ | 11/17/15
In a recent interview, Gaza ENT doctor Muhammad Yahya Barzaq said that he had written a book refuting Einstein's Theory of Special Relativity. "Had Einstein deigned to read the discoveries of Christian Doppler, we would never have had something called the Einstein Theory," he said. Barzaq further said that he had come up with his invention of what he called a "cartridge plane" after replacing a cassette at the exact moment when an airplane was flying overhead. On the issue of Gaza he said that people there "deserve to live because they have the benefit and interest of humanity at...
• ### What Are Quantum Gravity's Alternatives To String Theory?

12/20/2015 8:13:09 AM PST · by MtnClimber · 14 replies
Forbes/Science ^ | 17 Dec, 2015 | Ethan Siegel
The Universe we know and love - with Einstein's General Relativity as our theory of gravity and quantum field theories of the other three forces - has a problem that we don't often talk about: it's incomplete, and we know it. Einstein's theory on its own is just fine, describing how matter-and-energy relate to the curvature of space-and-time. Quantum field theories on their own are fine as well, describing how particles interact and experience forces. Normally, the quantum field theory calculations are done in flat space, where spacetime isn't curved. We can do them in the curved space described by...
• ### The Most Mind-Bending Fact I Learned in Physics

11/19/2015 10:56:52 PM PST · by LibWhacker · 64 replies
Real Clear Science ^ | 11/2015 | Tom Hartsfield
Physics is built out of philosophically fascinating ideas. Or, at least, ideas that fascinate us as physicists. We are often moved to reverentially proclaim the beauty of various concepts and theories. Sometimes this beauty makes sense to other people (we're made of star stuff) and other times it's opaque (Frobenius manifolds in psuedo-Euclidean spaces). I have my own personal favorite idea. It arises from the philosophically fantastic (but mathematically moderate) workings of Einstein's relativity theory. The theory of special relativity holds that time and space are not separate entities, each operating on its own; rather they are intimately and inextricably...
• ### Core Concept: Atom interferometry (May help scientists figure out what dark matter is, etc.)

10/08/2015 6:26:20 PM PDT · by LibWhacker · 6 replies
PNAS ^ | Oct 2015 | Maggie McKee
Sometimes you have to think outside the box. Faced with some of the universe’s most stubborn mysteries, such as the identity of dark matter, physicists are turning to a technique that employs the weird laws of quantum mechanics: atom interferometry. Atom interferometers allow the study of various physical phenomena by splitting atom waves using a nanograting, such as this one. Composed of silicon nitride, this grating, imaged with a scanning electron microscope, has a period of 100 nm. Image courtesy of Alex Cronin (University of Arizona, Tucson, AZ). This method, which takes advantage of the fact that quantum particles behave...

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