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Researchers now able to stop, restart light

Researchers now able to stop, restart light
By William J. Cromie Gazette Staff "Two years ago we slowed it down to 38 miles an hour; now we've been able to park it then bring it back up to full speed." Lene Hau isn't talking about a used motorbike, but about light – that ethereal, life-sustaining stuff that normally travels 93 million miles from the sun in about eight minutes. Less than five years ago, the speed of light was considered one of the universe's great constants. Albert Einstein theorized that light cannot travel faster than 186,282 miles per second. Hau, 41, a professor of physics at Harvard, admits that the famous genius would "probably be stunned" at the results of her experiments. "It's nifty to look into the chamber and see a clump of ultracold atoms floating there," Hau says. She and her team continued to tweak their system until they finally brought light to a complete stop. "We didn't have much contact," she notes, "just a few e-mails." Stopping cold Hau and her group then figured out a way to make it work.

http://www.news.harvard.edu/gazette/2001/01.24/01-stoplight.html

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Complicated Mechanisms Explained in simple animations - GadgetsWow.com Author: admin Filed under: General Date: Aug 1,2010 Radial Engines Radial engines are used in aircrafts having propeller connected to the shaft delivering power in order to produce thrust its basic mechanism is as follows Steam engine Principle Steam engine once used in locomotives was based on the reciprocating principle as shown below Is Dark Energy Really "Repulsive Gravity"? In 1998 scientists discovered that the universe is not only expanding but that its expansion is accelerating. This totally unexpected behavior has been called the "most profound problem" in physics , because our current understanding of gravity says that attractions between mass in the universe should be causing the expansion to slow down. The leading theory to explain the accelerating expansion is the existence of a hypothetical repulsive force called dark energy. (Related: "New Galaxy Maps to Help Find Dark Energy Proof?"

Otomata 16 Jul 2011 Click on the grid below to add cells, click on cells to change their direction, and press play to listen to your music. Update: Click here to get Otomata for your iPhone / iPod / iPad! Snobbish photons forced to pair up and get heavy Ordinarily, photons—particles of light—don't interact with each other. They interfere, but that's a characteristic that doesn't alter their wavelength or cause them to attract or repel. However, if photons can be induced to interact, it could open up a wide number of applications in quantum computing and optical materials.

Teleportation - StumbleUpon Teleportation is the name given by science fiction writers to the feat of making an object or person disintegrate in one place while a perfect replica appears somewhere else. How this is accomplished is usually not explained in detail, but the general idea seems to be that the original object is scanned in such a way as to extract all the information from it, then this information is transmitted to the receiving location and used to construct the replica, not necessarily from the actual material of the original, but perhaps from atoms of the same kinds, arranged in exactly the same pattern as the original. A teleportation machine would be like a fax machine, except that it would work on 3-dimensional objects as well as documents, it would produce an exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it. In 1993 an international group of six scientists, including IBM Fellow Charles H.

Atomic Weapon Time Travel Research Center © 2005 Cetin BAL - GSM:+90 05366063183 - Turkey/Denizli Atomic Weapon - Atom bombası Diagram-1 Diagram -2 Diagram-1 Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. Designer High @DesignerHigh.com Kravin Glass, located in Colorado, creates some of the most unique and intricate glass pipes on the market. The examples we’ve featured below are some of their finest, but you can find several more examples on their homepage, including videos of their creation. Unique glass pipes with evolving shapes and styles. Image credits: Kravin Glass

Tying Light in Knots [Slide Show] Knots can help unravel some knotty (sorry!) situations. The mathematical study of knotted shapes has proved constructive for many branches of physics, from understanding how fluids flow to developing quantum computers. Now physicists have found that light itself can be knotted by discovering a new set of solutions to the famous Maxwell equations of electromagnetism. In the 1860s Scottish physicist James Clerk Maxwell wrote down a series of equations describing how electric and magnetic fields form and change. These foundational formulas, still printed in almost every physics textbook, led to the crucial realization that light is an electromagnetic phenomenon.

Quantum Entanglement and Information (Stanford Encyclopedia of Philosophy) - StumbleUpon First published Mon Aug 13, 2001; substantive revision Thu Aug 26, 2010 Quantum entanglement is a physical resource, like energy, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information channel to perform computational and cryptographic tasks that are impossible for classical systems.

Match Stick Rocket Match Stick Rocket SUBJECT: Rocketry TOPIC: Propulsion DESCRIPTION: A small solid propellant rocket is made from a match and a piece of aluminum foil. CONTRIBUTED BY: Steve Culivan, KSC Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics Electrodynamics Quantum Mechanics How To… Embed This Infographic <a href= ‎"><img src=" title="10 How Tos" alt="How To Infographic" border="0" class="nopin" /></a><br />Source: <a href=' title='Interesting Facts'><a href=' title='Interesting Facts'>Today I Found Out</a></a> 1) How to drastically increase the life of your shaving razor Before or after you shave (I prefer before so that the blades are dry), place your jeans on a hard flat surface; then run the razor up the pant legs about 10-15 times quickly; then repeat running it down the pant legs 10-15 times quickly. No need to press that hard, but a little pressure is necessary. necessary.

Hot water freezes faster than cold - and now we know why. Hot water seems to freeze faster than cold water, known as the Mpemba effect. The effect was named after the Tanzanian student who in 1963 noticed that hot ice cream mix freezes faster than a cold one. The effect was first observed by Aristotle in the 4th century BC, then later Francis Bacon and René Descartes. Mpemba published a paper on his findings in 1969. Theories for the Mpemba effect have included: faster evaporation of hot water, therefore reducing the volume left to freeze; formation of a frost layer on cold water, insulating it; and different concentrations of solutes such as carbon dioxide, which is driven off when the water is heated. Unfortunately the effect doesn’t always appear - cold water often does actually freeze faster than hot, as you would expect.

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