Physics

Physics duo create tractor beam using dual Bessel beams

(Phys.org)—David Ruffner and David Grier of New York University have developed a technique for using Bessel beams to draw a particle toward a source. In their paper published in Physical Review Letters they describe how they used their technique to pull 30 micrometer sized silica spheres suspended in water, towards a laser source.

Hunt for the platypus particle

All of the atoms in our bodies are made of electrons, protons and neutrons, and the protons and neutrons can be further broken down into quarks. Fundamentally, then, we are made of only two types of particles: electrons and quarks. But what do these labels mean? Why do we even say that electrons and quarks are different from each other?

From Particles to People: The Laws of Nature and the Meaning of Life | Cosmic Variance

<p>That&#8217;s the charmingly grandiose title of a talk I gave at The Amazing Meeting this past July, <a rel="nofollow" target="_blank" href="http://www.youtube.com/watch?v=X5Fel1VKEN8">now available online</a>. I hope that the basic message comes through, although the YouTube comments indicate that the nitpicking has already begun in earnest. There&#8217;s a rather lot of material to squeeze into half an hour, so some parts are going to be sketchy.</p>

NASA Commercial Crew Partner Blue Origin Completes Pad Escape Test

NASA's Commercial Crew Program (CCP) partner Blue Origin conducted a successful pad escape test Friday at the company's West Texas launch site, firing its pusher-escape motor and launching a full-scale suborbital crew capsule from a simulated propulsion module.

Chaos theory helps to predict the outcome at the roulette table

At first glance, a roulette table looks like a jumble of numbers and a randomly hopping little white ball. But with a better understanding of physics and some general knowledge of the starting conditions, it may be possible to shift the odds of winning a little in your favor. According to new research published in the American Institute of Physics' journal Chaos, by knowing some of the starting conditions – such as the speed of the spin and the rotation of the ball – this game of chance starts to look a little less random.

Breakthrough offers new route to large-scale quantum computing

In a key step toward creating a working quantum computer, researchers have developed a method that may allow the quick and reliable transfer of quantum information throughout a computing device.<img src="http://feeds.feedburner.com/~r/sciencedaily/matter_energy/physics/~4/n36... height="1" width="1"/>

Goodness, gracious, great balls of lightning!

Australian scientists have unveiled a new theory which explains the mysterious phenomenon known as ball lightning.<img src="http://feeds.feedburner.com/~r/sciencedaily/matter_energy/physics/~4/fLG... height="1" width="1"/>

NASA Glenn Shares Stem Education Message with Ohio Students

Reporters are invited to NASA Glenn Science Days at Lake Ridge Academy on Monday, Oct. 22 through Wednesday, Oct. 24, from 8:30 a.m. to 3 p.m.

Astronomers Uncover a Surprising Trend In Galaxy Evolution

A comprehensive study of hundreds of galaxies observed by the Keck telescopes in Hawaii and NASA's Hubble Space Telescope has revealed an unexpected pattern of change that extends back 8 billion years, or more than half the age of the universe.

NASA to Preview Upcoming Space Station Spacewalk to Repair Ammonia Leak

NASA will hold a news conference at 1 p.m. CDT (2 p.m. EDT) Friday, Oct. 26, to preview an upcoming spacewalk involving U.S. and Japanese astronauts aboard the International Space Station. The news conference will be broadcast live on NASA Television from the agency's Johnson Space Center in Houston. Media questions will be taken by telephone and from other participating NASA locations.

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