A metamaterial sends rays of light cascading around a ball, rendering it invisible,in this schematic. David Schurg
From Discover:
Engineers are working with metamaterials to create super-microscopes, optical computers, and yes, invisibility cloaks
Xiang Zhang remembers the day he recognized that something extraordinary was happening around him. It was in 2000, at a workshop organized by DARPA (the Defense Advanced Research Projects Agency) to explore a tantalizing idea: that radical new kinds of engineered materials might enable us to extend our control over matter in seemingly magical ways.
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