Authored By: An invisibility cloak, like the one imagined in the Harry Potter, books may not be a fantasy after all. Duke University engineers first created a prototype of such a device in 2006, and now they have invented a new cloaking device that is even more effective.
The device is made of composite materials called "Metamaterials" that make an object invisible by hiding it from light. It works by directing electromagnetic waves around and object. Then the waves appears on the other side of the object as if nothing had stood in their way.
The new cloaking technology could make wireless communications work over much greater distances by allowing waves to flow around objects. Buildings in noisy locations could be perfectly sound-proofed in the same way.
This program first published April 2009
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