Thought for the month

“In the choice between changing one’s mind and proving there is no need to do so, most people get busy on the proof.” John K. Galbraith, Economist (1908 – 2006).

Thursday, 24 May 2012

Whose sonic screwdriver?

I still think that Dr Who has the edge for overall usefulness, but a group at the University of Dundee have come up with their version of a sonic screwdriver. The team used an array to form an ultrasound beam that can both carry momentum to push away an object in its path and, by using a beam shaped like a helix or vortex, cause objects to rotate. The Sonic Screwdriver can be viewed rotating a rubber disc.

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