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Italian Journal of Psychology and Internet
Psicologia Online

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nelle pagine dell'archivio si ritrova la storia di
Italian Journal of Psychology and Internet - Psicologia Online
ma anche la storia della psicologia italiana e mondiale in rete
dal 1996 al 2000
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domenica 6 maggio 2007

Invisibility made possible, by mathematicians

Envision This: Mathematicians Design Invisible Tunnel

Call it Harry Potter's invisible sleeve. New calculations show how to make an electromagnetic "wormhole"—a tube that is invisible from the sides but allows light to shine down the center.

The concept is a twist on a spherical cloak of invisibility proposed last year. Such a device would be made of metamaterial, a thicket of metal rings or other shapes that bends light in funny ways. A hollow shell of metamaterial could in principle channel light around its inner space without slowing the light down, rendering that hidey-hole invisible to the outside world.

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