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A working tractor beam has now been caught on video, showing how light can pull objects - on a microscopic scale.
While it's well known that light can push objects as they follow the flow of photons, attracting them isn't as simple. By shining a laser through a lens and mirror set-up, Tomas Cizmar from the University of St Andrews in the UK and colleagues were able to reverse the effect, thanks to the interference pattern of reflected beams. Their technique works both in liquids and in a vacuum.
I searched: tractor beam
Originally posted by goou111
I searched for this and was surprised I didnt see it..