Tractor beams, you know, the things that aliens use to steal our cows, are no longer restricted to movies and games- they’re real. Researchers at the Australian National University created a laser device that can move small particles multiple feet using nothing but thought light! Here’s how it works
The device works by shining a hollow laser beam around tiny glass particles. The air surrounding the particle heats up, while the dark center of the beam stays cool. When the particle starts to drift out of the middle and into the bright laser beam, the force of heated air molecules bouncing around and hitting the particle’s surface is enough to nudge it back to the center.
Well no, it’s not powerful enough to steal cows with, but soon- I’ll have all the free cows I want!