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Submission + - Dr. Who's sonic screwdriver a step closer to reality? (gizmag.com)

cylonlover writes: A University of Dundee research team led by Prof. Mike MacDonald has demonstrated that both levitation and twisting forces can be applied to an object by application of ultrasonic beams. The team of physicists at the University of Dundee in Scotland (with associates at Bristol University in England) have succeeded in generating an ultrasonic vortex beam strong enough to lift and rotate a rubber disk submerged in water. This latest breakthrough is part of a wide-ranging U.K. research effort to develop a device not unlike the "sonic screwdriver" made famous by the TV series Doctor Who.
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Dr. Who's sonic screwdriver a step closer to reality?

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"Consider a spherical bear, in simple harmonic motion..." -- Professor in the UCB physics department