Working Invisibility Cloak Created at Last

An invisibility cloak that works in the microwave region of the electromagnetic spectrum has been unveiled in the US. While not quite as effective as Harry Potter’s invisibility cloak, the device is the first practical version of a theoretical set-up first suggested by physicists earlier this year. About the size of a movie reel canister, the cloak works by steering microwave light around an object, making it appear to an observer as if it were not there at all

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