Thursday, June 30, 2011

"Acoustic cloak to hide ships from sonar":
"Invisibility cloaks" have been in the news since 2006, when scientists proposed that they could design synthetic materials that would bend light in ways that made the objects under them appear invisible. Three years ago, Steve Cummer at Duke University figured out that the same principle could be applied to sound waves, and his lab has now brought out their first physical proof of the idea.