Dark alien planet discovered by NASA. Physics I: Classical Mechanics - Download free content from MIT. Weird World of Quantum Physics May Govern Life. The-Observable-Universe.jpg. Splitting the Unsplittable: Physicists split an atom using quantum mechanics precision. Researchers from the University of Bonn have just shown how a single atom can be split into its two halves, pulled apart and put back together again.
While the word "atom" literally means "indivisible," the laws of quantum mechanics allow dividing atoms -- similarly to light rays -- and reuniting them. The researchers want to build quantum mechanics bridges by letting the atom touch adjacent atoms while it is being pulled apart so that it works like a bridge span between two pillars. TOP TEN UNSOLVED PROBLEMS IN PHYSICS. Chinese physicists achieve quantum teleportation over 60 miles.
Hold onto your seats: Chinese physicists are reporting that they’ve successfully teleported photonic qubits (quantum bits) over a distance of 97 kilometers (60mi).
How To Destroy A Black Hole. The idea of a body so massive that its escape velocity exceeds the speed of light dates back to the English geologist John Michell who first considered it in 1783.
In his scenario, a beam of light would travel away from the massive body until it reached a certain height and then returned to the surface. Modern thinking about black holes is somewhat different, not least because special relativity tells us that the speed of light is a universal constant. Expansion Map. Radio telescopes capture best-ever snapshot of black hole jets. An international team, including NASA-funded researchers, using radio telescopes located throughout the Southern Hemisphere has produced the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy.
"These jets arise as infalling matter approaches the black hole, but we don't yet know the details of how they form and maintain themselves," said Cornelia Mueller, the study's lead author and a doctoral student at the University of Erlangen-Nuremberg in Germany. The new image shows a region less than 4.2 light-years across -- less than the distance between our sun and the nearest star. Radio-emitting features as small as 15 light-days can be seen, making this the highest-resolution view of galactic jets ever made.
The study will appear in the June issue of Astronomy and Astrophysics and is available online. Motion Mountain - The Free Physics Textbook for Download. Antimatter:Mirror of the Universe. Here are 10,000 reasons to be excited about deep-space exploration. They'll ask why we continue to strive to see further and deeper into space than ever before, without knowing what we'll find.
They'll ask why we insist upon exploring a solar system that, by their account, has no immediate bearing on our lives. And they'll ask why, in light of recent budgetary crises, space agencies the world over deserve funding to seek out answers to the mysteries of a Universe that we will never fully understand. Strawmen are made of straw. The first two questions are asked by ignoramuses. The last question, however, can be rightly asked by those (like me) who can easily answer the first two questions. The Scale of the Universe. Radio Broadcast Extent. The History of the Universe in 200 Words or Less. Quantum fluctuation.
Inflation. Expansion. Strong nuclear interaction. Particle-antiparticle annihilation. Deuterium and helium production. Visualizing The Size And Scale Of Our World. Radiation Dosage Chart. Hubble Heritage Gallery of Images. Not-quite-so elementary, my dear electron.
Meaning of Halflife. I'd like to illustrate what this really means.
If living creatures had halflives the way radioactive atoms do, the world would be a very different place. What do you mean? Suppose there's an alien species with a halflife of, say, 70 years. You randomly pick out 16 baby aliens and track them to see how long they live. Quantum decision affects results of measurements taken earlier in time. Quantum entanglement is a state where two particles have correlated properties: when you make a measurement on one, it constrains the outcome of the measurement on the second, even if the two particles are widely separated.
It's also possible to entangle more than two particles, and even to spread out the entanglements over time, so that a system that was only partly entangled at the start is made fully entangled later on. This sequential process goes under the clunky name of "delayed-choice entanglement swapping. " And, as described in a Nature Physics article by Xiao-song Ma et al., it has a rather counterintuitive consequence. Quantum teleportation achieved over ten miles of free space. Quantum teleportation has achieved a new milestone or, should we say, a new ten-milestone: scientists have recently had success teleporting information between photons over a free space distance of nearly ten miles, an unprecedented length.
The researchers who have accomplished this feat note that this brings us closer to communicating information without needing a traditional signal, and that the ten miles they have reached could span the distance between the surface of the earth and space. As we've explained before, "quantum teleportation" is quite different from how many people imagine teleportation to work. Scientists Discover The Oldest, Largest Body Of Water In Existence. Heads Up, Hoverboarders: Here Comes Quantum Levitation.
Few motifs of science fiction cinema have been more appealing to us than the subtle defiance of gravity offered by futuristic hovercraft.
Spacetime Invisibility Cloaks. Einstein for Everyone. Einstein for Everyone Nullarbor Press 2007revisions 2008, 2010, 2011, 2012, 2013 Copyright 2007, 2008, 2010, 2011, 2012, 2013 John D. Norton Published by Nullarbor Press, 500 Fifth Avenue, Pittsburgh, Pennsylvania 15260 with offices in Liberty Ave., Pittsburgh, Pennsylvania, 15222 All Rights Reserved John D. An advanced sequel is planned in this series:Einstein for Almost Everyone 2 4 6 8 9 7 5 3 1 ePrinted in the United States of America no trees were harmed. STEPHEN HAWKING: How to build a time machine. By STEPHEN HAWKING Created: 18:47 GMT, 27 April 2010.