Invisibility Shield Proposed

Scientists at the University of Pennsylvania have proposed a new approach to making objects invisible, by tuning special materials such that they cancel the scattering of light. The technology has a few drawbacks — it only works for specific wavelengths of light at various scales — but it’s a start. Objects that are rendered "invisible" by this technique neither absorb nor scatter light, and appear to be much smaller than their actual size, if they appear at all.

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