Browsing All Posts filed under »Physics«

Visible Spectrum: Can it be color shifted?

April 22, 2013

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A typical human eye will respond to wavelengths from about 390 to 700 nm.[1] In terms of frequency, this corresponds to a band in the vicinity of 430–790 THz. A light-adapted eye generally has its maximum sensitivity at around 555 nm (540 THz), in the green region of the optical spectrum (see: luminosity function). The […]

Computing 1-0-1: quantum information in an atom’s core

April 19, 2013

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… As published in Nature today, my colleagues and I have established a world-first in this area. We’ve demonstrated a quantum bit (or qubit) based on the nucleus of a single atom in silicon, promising dramatic improvements for data processing in the ultra-powerful quantum computers of the future. …What determines the size of the atom […]

New solar-cell coating could boost efficiency

April 18, 2013

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Throughout decades of research on solar cells, one formula has been considered an absolute limit to the efficiency of such devices in converting sunlight into electricity: Called the Shockley-Queisser efficiency limit, it posits that the ultimate conversion efficiency can never exceed 34 percent for a single optimized semiconductor junction. Now, researchers at MIT have shown […]

“Spooky Action at a Distance” in the Quantum World Shortly Before Final Proof

April 15, 2013

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… Physicists have succeeded in closing the last local realistic loophole for systems of entangled photons. In everyday life it is only natural that the properties of objects exist independent of being observed or not. The quantum world on the other hand is ruled by other laws: the property of a particle may be not […]

Iranian Scientist Claims To Invent ‘Time Machine’

April 12, 2013

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An Iranian inventor recently claimed he created a “time machine,” according to reports. But the Internet is skeptical, and with good reason. The Telegraph caused a stir Wednesday with a story about a young Tehran-based scientist, Ali Razeghi, and an invention he calls“The Aryayek Time Traveling Machine.” Reportedly something of a mad scientist, Razeghi claimed […]

Scientists discover dark lightning

April 11, 2013

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… scientists recently discovered something mind-bending about lightning: Sometimes its flashes are invisible, just sudden pulses of unexpectedly powerful radiation. It’s what Joseph Dwyer, a lightning researcher at the Florida Institute of Technology, has termed dark lightning. Unknown to Franklin but now clear to a growing roster of lightning researchers and astronomers is that along […]

Interdisciplinary team demonstrates superconducting qualities of topological insulators

April 10, 2013

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  Topological insulators (TIs) are an exciting new type of material that on their surface carry electric current, but within their bulk, act as insulators. Since the discovery of TIs about a decade ago, their unique characteristics (which point to potential applications in quantum computing) have been explored theoretically, and in the last five years, […]

Puzzle of how spiral galaxies set their arms comes into focus

April 3, 2013

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As the shapes of galaxies go, the spiral disk — with its characteristic pinwheel profile — is by far the most pedestrian. Our own Milky Way, astronomers believe, is a spiral. Our solar system and Earth reside somewhere near one of its filamentous, swept-back arms. And nearly 70 percent of the galaxies closest to the […]

New type of solar structure cools buildings in full sunlight

March 28, 2013

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Homes and buildings chilled without air conditioners. Car interiors that don’t heat up in the summer sun. Tapping the frigid expanses of outer space to cool the planet. Science fiction, you say? Well, maybe not any more. A team of researchers at Stanford has designed an entirely new form of cooling structure that cools even […]

Wikileaks: The Government Is Spying On You Through Your iPhone

March 24, 2013

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The FinFisher Trojan is government spyware that is installed via a phony iTunes update. Image by Gamma International UK Ltd. Your iPhone could be spying on you, according to the latest trove of documents from Wikileaks, which looks like it could be the biggest scandal yet. Called the Spyfiles, it’s a trove of documents about […]

Laser-like photons signal major step towards quantum ‘Internet’

March 20, 2013

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The realisation of quantum networks is one of the major challenges of modern physics. Now, new research shows how high-quality photons can be generated from ‘solid-state’ chips, bringing us closer to the quantum ‘internet’. The number of transistors on a microprocessor continues to double every two years, amazingly holding firm to a prediction by Intel […]

CERN: New particle is confirmed Higgs boson

March 14, 2013

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A new particle discovered at the Large Hadron Collider last year has been confirmed to be the Higgs boson. Here, proton-proton collisions at the Large Hadron Collider showing events consistent with the Higgs. (Credit: CERN/CMS/Taylor, L; McCauley, T) Physicists from the Atlas and CMS experiments at CERN’s Large Hadron Collider announced Thursday that they are […]

NASA has found a free particle accelerator floating in space

February 27, 2013

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In early 2007, NASA’s Cassini spacecraft observed something extraordinary around Saturn. An unusually strong blast of solar wind sent subatomic particles crashing into the ringed planet’s magnetic field, giving rise to perhaps the most tremendous shock wave ever observed emanating from the planet. But newly announced findings reveal the biggest surprise was yet to come. […]

How particle smasher and telescopes relate (What the universe is made of)

February 20, 2013

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… What the universe is made of … Over the last few decades, scientists have come to the conclusion that the universe’s composition is only about 5% atoms — in other words, the stuff that we see and know around us. That means the rest is stuff we can’t see. About 71% is something called […]

Curves in spacetime violate Heisenberg’s uncertainty principle

February 20, 2013

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If an object traveling through spacetime can loop back in time in a certain way, then its trajectory can allow a pair of its components to be measured with perfect accuracy, violating Heisenberg’s uncertainty principle. This new finding involves a particular trajectory called an open timelike curve (OTC), which is a special case of a […]

Light from nothing

February 17, 2013

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‘Virtual particles’ can have real physical effects. A vacuum might seem like empty space, but scientists have discovered a new way to seemingly get something from that nothingness, such as light. And the finding could ultimately help scientists build incredibly powerful quantum computers or shed light on the earliest moments in the universe’s history. Quantum […]

Physicists Create Crystals That Are Nearly Alive

February 9, 2013

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The best way to understand something–such as life–is to build it yourself. That’s why, determined to understand the way groups move, a team of New York University physicists set out to create particles that could imitate the way flocks of birds, schools of fish and even colonies of bacteria organize and move together. What they […]

Researchers create metamaterial that looks similar to 3D Minkowski spacetimes

February 2, 2013

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—Researchers from the University of Maryland and Towson University have created a new type of metamaterial that they describe as looking similar to 3D Minkowski spacetimes. In their paper, which they’ve uploaded to the preprint server arXiv, the researchers explain how the metamaterial can be adjusted to create a demonstration of a multiverse. Because the […]

Expert psychologist suggests the era of genius scientists is over

February 2, 2013

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Dean Keith Simonton, a psychology professor at the University of California, has published a comment piece in the journal Nature, where he argues that it’s unlikely mankind will ever produce another Einstein, Newton, Darwin, etc. This is because, he says, we’ve already discovered all the most basic ideas that describe how the natural world works. […]

Miniature Star Trek-Style ‘Tractor Beam’ Created in Lab

January 31, 2013

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…A group of scientists from Scotland and the Czech Republic says it’s managed to drag around teeny-tiny objects using nothing more than a beam of light. That’s essentially how it worked when the crew of the starship Enterprise periodically unleashed its tractor beam to tug derelict vessels (and once even the captain himself, snared by […]

Hearing Test – high frequency sounds measure hearing loss

January 26, 2013

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We got a lot of positive feedback on our “Can You Hear Like a Teenager? ” article, and it inspired us to take it just a little bit further. Here is a list of tones that go from 8Hz all the way up to 22,000Hz. It’s fairly common for people who are over 25 years […]

Do cell phones cause cancer?

January 22, 2013

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Do cell phones cause cancer?  There was a big study of cell phones that found no cancer (brain, nerve, salivary and leukemia anyway): … the Journal of the National Cancer Institute published the results of a massive study in Denmark that followed the cancer histories of 420,000 cell phone users over 13 years. http://jnci.oxfordjournals.org/content/93/3/203.abstract?ijkey=fe4d6f43f440f51426ab0fba45f17afc8d353c06&keytype2=tf_ipsecsha The […]

Star Wars ‘hyperdrive’ space flight explored by physicists

January 15, 2013

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… if it were possible, the reality of interstellar travel would be a lot less spectacular, according to a group of student physicists. The ”hyperdrive” featured in Star Wars enables Han Solo’s Millennium Falcon spaceship to take short cuts between stars through a higher dimension of space. Racing through hyperspace at near light speed, the […]

A rock is a clock: Physicist uses matter to tell time

January 12, 2013

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Ever since he was a kid growing up in Germany, Holger Müller has been asking himself a fundamental question: What is time? That question has now led Müller, today an assistant professor of physics at the University of California, Berkeley, to a fundamentally new way of measuring time. Taking advantage of the fact that, in […]

Audio Myths Workshop

January 10, 2013

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I found this in my quest to improve my home recording and there are many things in it everyone will find interesting. Check out at least up to 13:00 after the photo lineup.  

Freezing antimatter could allow scientists to study it

January 8, 2013

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A Canadian scientist at the forefront of research on antimatter has proposed a novel way to solve one of the field’s most daunting problems — what to keep it in. For experimental physicists, antimatter is an elusive quarry because it will vanish in a flash of light upon contact with anything made of regular matter. […]