From Breitbart/AP:WASHINGTON (AP) - They can't match Harry Potter yet, but scientists are moving closer to creating a real cloak of invisibility.
Researchers at Duke University, who developed a material that can "cloak" an item from detection by microwaves, report that they have expanded the number of wavelengths they can block.
Last August the team reported they had developed so-called metamaterials that could deflect microwaves around a three-dimensional object, essentially making it invisible to the waves.
The system works like a mirage, where heat causes the bending of light rays and cloaks the road ahead behind an image of the sky.
The researchers report in Thursday's edition of the journal Science that they have developed a series of mathematical commands to guide the development of more types of metamaterials to cloak objects from an increasing range of electromagnetic waves.
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