In 2006, a team of U.S. and British scientists demonstrated the world’s first working “invisibility cloak.” The team, led by Sir John Pendry, created a small device 12cm across that redirects microwave radiation around it, rendering it invisible to microwaves.
It works using metamaterials. A metamaterial is a material engineered to have one or more properties that are not possible with natural materials. Radiation can be bent, amplified, absorbed, or blocked in a manner that far exceeds what is possible with conventional materials.
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