Cloak of Invisibility Takes a Step Forward

WASHINGTON (AP) - Harry Potter would be pleased, science is
slowly catching up with him.

Scientists have taken a small but important new step toward
making a cloak of invisibility.

Researchers in Germany say they were able to cloak a tiny bump
in a layer of gold. It prevented its detection at nearly visible
infrared frequencies.

The device worked in three dimensions, while previously
developed cloaks worked in two dimensions.

In a report in today's online edition of the journal Science,
researchers say the cloak is made of crystals with air spaces in
between, sort of like a woodpile, that bends light, hiding the
bump.

(Copyright 2010 by The Associated Press. All Rights Reserved.)


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