By Tuning a Laser to Pull Rather Than Push, Researchers Design a Working Tractor Beam
Posted by ChevScience on June 15, 2011
There’s no escaping it: though the tractor beam is a staple of sci-fi space-faring scenarios, it’s also extremely counter-intuitive. How does one pull something in via an outward propagating beam? Now a few Chinese researchers think they’ve found the answer via a theoretical method that should generate a backward pulling force from a forward traveling stream of photons.