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Invisibility within sight

Scientists demonstrate two new materials able to bend light backward

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12:38pm, August 11, 2008
At this rate, Harry Potter skeptics may soon be left with no place to hide. Two new materials that bend light backward suggest that invisibility cloaks like Harry’s could some day become feasible.

The two materials, one described in a paper to appear in Science and the other reported online by Nature on August 11, take different approaches toward the same goal, says Xiang Zhang of the University of California, Berkeley, senior author of both papers. That goal is to bend light in the opposite direction than it would when entering an ordinary material.

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