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The First Invisibility Shield

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For Cars

Photo Credit: John MacNeill

So where can I buy that?

   

WHAT: A way to make objects invisible. The trick is to use metamaterial, a complex hybrid structure of metal and insulator that makes light move around an object like air flowing over an airplane wing. In a process called refraction, these materials interact with light in such a way that it travels faster through the metamaterial than it does through a vacuum, the famed c in Einstein’s special theory of relativity. Properly tuned, the light emerges from the shield as if there were no object present. But unfortunately for would-be spies, it’s very difficult to make cloaking devices that work on more than one wavelength of light at a time.

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Posted by   @   3 October 2006 0 comments
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