Scientists in Spain demonstrate original technology that uses a field of ultrasonic waves to grab tiny objects and wobble them around. The technology works by using an array of flat speakers to produce acoustic holograms. Just as visual holograms are produced in 3D from interfering light waves, so acoustic holograms are made by interfering sound wavesRead the force awakens: tractor beam becomes a realityThis footage was originally published on YouTubeContinue reading...
Source: theguardian.com