Physicists Created a 'Tractor Beam' for Floating Objects

A group of physicists from the Australian National University have created a "tractor beam" on water that lets them manipulate floating objects.

They used wave generators and a ping pong ball in a wave tank, calculating the size and the frequency of waves needed to move the ball in any direction, even against the direction of the wave

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"We have figured out a way of creating waves that can force a floating object to move against the direction of the wave," said Dr. Horst Punzmann from the Research School of Physics and Engineering, who led the project. Read more...

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