It?s possible to be invisible! | india | Hindustan Times
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It?s possible to be invisible!

Here?s some news for all Harry Potter fans ? it may not be long before the boy wizard?s invisibility cloak is available. Two separate teams of researchers have come up with theories on ways to use experimental ?metamaterials? to cloak an object and hide it from visible light.

india Updated: May 27, 2006 15:52 IST

Here’s some news for all Harry Potter fans — it may not be long before the boy wizard’s  invisibility cloak is available. Two separate teams of researchers have come up with theories on ways to use experimental “metamaterials” to cloak an object and hide it from visible light.

The concept begins with refraction — a quality of light in which the electromagnetic waves take the quickest, but not necessarily the shortest, route.

This accounts for the illusion that a pencil immersed in a glass of water appears broken, for instance. “Imagine a situation where a medium guides light around a hole in it,” Physicist Ulf Leonhardt of Britain’s University of St Andrews, wrote in the journal Science.

The light rays end up behind the object as if they had travelled in a straight line. “Any object placed in the hole would be hidden from sight. The medium would create the ultimate optical illusion: invisibility,” Leonhardt wrote.