29 Apr '14, 6pm

Three Weird Ways to Make Things Invisible

Three Weird Ways to Make Things Invisible

Since the original work, researchers have found methods to cover wider bands of wavelengths and make objects invisible from a wider field of view. They’ve even developed cloaks to hide things at visible wavelengths, although the hidden objects tend to be just a few millimeters wide. Zhang says that in theory it’s possible to build cloaks for any sort of wave, including sound waves and heat waves. In practice, while there have been plenty of advancements in the last half dozen years, there are still a lot of problems to be solved. “You can make cloaks. The question is, can you scale them up?” Zhang says. He believes invisibility will eventually be possible, but, he says, “I wouldn’t say how long it will take. It’s not an easy task.” Here are three new ways that researchers are using to make objects invisible.

Full article: http://spectrum.ieee.org/semiconductors/materials/three-w...

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