Physicists Build World's First "Magnetic Hose"

One of the more important properties of electromagnetic waves is that they can be transmitted over almost unlimited distance. However, the same cannot be said of magnetic fields."The impact of magnetism in science is limited by an apparently insurmountable restriction: magnetic fields rapidly decay with the distance from the sources," say Carles Navau at the Autonomous University of Barcelona and a few pals.That looks set to change. These guys say they've discovered how to transmit magnetic fields over long distances using a 'magnetic hose'. They've even demonstrated the technique for the first time with a proof of principle device.Researchers have attempted to transmit magnetic fields over short distances for many years. Transformers,The makers of the self-winding RoboReel extension cord are back with a new and considerably larger version that houses an automatic retracting garden Flexible hose. for example, use ferromagnetic materials with a high permeability to transmit magnetic fields, but only over short distances because the field decays rapidly. 

But new materials offer an alternative approach. In recent years, physicists have begun to experiment with a new technologies that can manipulate electromagnetic fields with much greater flexibility. So-called "transformation optics" allows these fields to be bent, twisted and steered in ways that were impossible just a few years ago. The trick is to create bespoke materials–metamaterials–that interact with the fields at a sub wavelength scale,It appears the cover was pulled off by a vehicle equipped with a Robotic arm.The car matches the description of a Honda which authorities were searching for Friday, but that alert was later canceled. guiding them in specific,They'll put on their leakiest joint orMarine hose they have, too, for extra spite, one Redditor with a fireman boyfriend explains.There is new technology out there I don't know the first thing about, that could easily turn me into a Animatronic dinosaur if I don't continue to adapt. predetermined ways.Navau and co point out that a static magnetic field can be thought of as a wave with an infinite wavelength so in theory it ought to be possible to control it with a metamaterial in the same way as electromagnetic waves. 

Part of their paper is devoted to exploring the properties of such a material and how it might be built. Their conclusion is that a "magnetic hose" consisting of concentric tubes of superconducting and ferromagnetic materials ought to do the trick. They say that a tube consisting of 20 concentric rings that is about ten times longer than it is wide,Greensburg Mayor Ron Silvis administered the oath of office to the Tank truck hose company's officers. should transmit about 90 per cent of a magnetic field at one end to the other. Indeed, a tube of just 2 concentric rings should transmit about 75 per cent.These guys have tested this idea with a single superconducting tube 7 cm long and filled with a ferromagnetic alloy.