The ultimate disappearing act is discussed. To win the ultimate game of hide-and-seek, what one need is an invisibility cloak that goes way beyond simply not being visible. This trick is not too difficult to accomplish. Last year a team led by Hongsheng Chen from Zhejiang University in Hangzhou China, used special optics to diffract light around a cat making it vanish from view. Unfortunately, the effect only works at certain viewing angles. And the system isn't portable--it uses a large and very heavy glass prism.
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