Items tagged with tractor-beam

Nobody’s going to be pulling enemy star fighters into a mothership Star Trek-style anytime soon, but researchers at the University of St. Andrews (Scotland) and the Institute of Scientific Instruments (ISI, Czech Republic) have developed a tractor beam--or at least an experimental version of the concept. Basically, they figured out how to make an optical field that allows them to reverse the normal forward-moving radiation pressure of light to create a negative force that pulls particles instead of pushing them. This step forward opens the door for relatively inexpensive devices that can... Read more...