Hyperlens sharpens sights with sound Nov 20, 2009
Unlike an electromagnetic wave, which doesn't need a medium to propagate through, sound waves need some physical material such as air or water. Click for related content. (MSNBC -- Technology)
Time to take in hand birds in the bush Nov 5, 2009
Momentarily distracted from their coffee and chit-chat, patrons gazed up to see a large flock of yellow-tailed black cockatoos heading north, using Lygon Street like an electromagnetic wave guide. Could life ever be the same amid the asphalt, concrete and glass after this. (Sydney Morning Herald -- Opinion)
Scientists create world's smallest semiconductor laser Sep 1, 2009
While it is traditionally accepted that an electromagnetic wave - including laser light - cannot be focused beyond the size of half its wavelength, research teams around the world have found a way to compress light down to dozens of nanometers by binding it to the electrons that oscillate collectively at the surface of metals. This interaction between light and oscillating electrons is known as surface plasmons. (India Times, India -- Health/Science)
Device Guides Light Around Corners Aug 1, 2009
1, 2009) Using a composite metamaterial to deliver a complex set of instructions to a beam of light, Boston College physicists have created a device to guide electromagnetic waves around objects such as the corner of a building or the profile of the eastern seaboard ... An illustration shows a simulated electromagnetic wave propagation. (Science Daily)
* Electromagnetic wave levels disputed Jul 28, 2009
Electromagnetic wave levels disputed ... Members of environmental groups protest in front of the Environmental Protection Administration in Taipei yesterday to demand the government lower electromagnetic wave safety standards to a maximum of 1 milli-Gauss (mG) ... Representatives of environmental groups gathered in front of the Environmental Protection Administration (EPA) yesterday to urge the government to lower electromagnetic wave safety standards to a maximum of 1 milli-Gauss (mG). (Taipei Times, Taiwan -- World Business)
Earth's Magnetic Field Hisses Due to Distant "Chorus" May 8, 2009
The faint "shh" sound that scientists now call the plasmaspheric hiss is the result of an electromagnetic wave in Earth's radiation belts. The hiss wave appears to reduce levels of dangerous electrons in the radiation belts by deflecting the particles from their stable trajectories and sending them into the dense upper atmosphere, where they are lost. (National Geographic)
TV museum is channeling history Feb 12, 2009
Visitors can experiment with a model of Heinrich Hertz's 1880s transmitter and receiver, which first proved the existence of electromagnetic waves and made radio and television possible. Press a button on the transmitter to send an electromagnetic wave to a receiver that lights up. (Boston Globe)
The man who rocked biology to its core Feb 12, 2009
James Clerk Maxwell had figured out the formulas for explaining light, showing that it was a kind of electromagnetic wave. Physicists had discovered the law of conservation of energy. (Science News for Kids)
