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article imageResearchers invent invisibility cloak

By Owen Weldon     Sep 22, 2015 in Science
Berkeley - Scientists have developed a invisibility cloak that can be folded up, as well as wrapped around microscopic objects of any shape.
When the cloak is wrapped around objects, they become undetectable in the visible spectrum. As of now, the technology could be useful in optical commuting, but researchers did say that the cloak could be scaled up in size and it wouldn't be that hard to do.
The new study, which was published in the journal Science, shows that the cloak can render an object invisible by manipulating certain wavelengths of light. Light plays a major role in how people see objects. Usually light will bounce off of objects and they become distorted, which helps a person see an object's curves and angles.
Microscopic rectangular gold blocks is what the cloak is made up of, and the blocks act like a skin, and it adapts the shape of the object that it is covering. The object becomes optically undetectable, as light bounces off the object like a flat mirror.
Researchers tested the cloak out by wrapping it around a minuscule 3D object. Xiang Zhang, the director of the Materials Sciences Division of the US Department of Energy's Lawrence Berkeley National Laboratory, said the test is the first time a 3D object with dents and bumps has been hidden from visible light.
Zhang did say that it would take five to 10 years before the technology is practical to use. Xingjie Ni, the lead author of the study, said that they could make a flat surface appear curved, and since they can make a curved surface appear flat, it means they can make it look like anything else.
It may be possible to use the device to cloak people.
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