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Sunday, March 15, 2009

Invisibility Cloak?

Some scientists have made some semi-serious noise about a Star Trek-ish invisibility cloak. The proposed system would comprise the object to be cloaked and a complementary object to cloak the first object (mutually, I suppose). It is a sort of light-canceling notion. However, the practicality is limited to one "wavelength." (Here, the HK scientist is referring to wavelength broadly, such as the wavelength of visible light.) So, as the author suggests, if you cloak an object in the visible light spectrum, an x-ray radar could still see it. A little more work is needed.

I have similar problems with my own invisibility project, too. For example, if I go into a room full of runway models, I'm totally invisible to them, but not to their bodyguards.

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