The world’s most powerful acoustic tractor beam could pave the way for levitating humans - Researchers held a two-centimetre polystyrene sphere, which measures over two acoustic wavelengths in size and is the largest yet trapped in a tractor beam, as reported in Physical Review Letters today.

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The world’s most powerful acoustic tractor beam could pave the way for levitating humans - Researchers held a two-centimetre polystyrene sphere, which measures over two acoustic wavelengths in size and is the largest yet trapped in a tractor beam, as reported in Physical Review Letters today.