Measuring Tiny Forces with Light

August 24, 2016 Office 0

Photons are bizarre: They have no mass, but they do have momentum. And that allows researchers to do counterintuitive things with photons, such as using light to push matter around. Recently, a group of scientists […]

NIST-4 Watt Balance

June 24, 2016 Office 0

A high-tech version of an old-fashioned balance scale at the National Institute of Standards and Technology (NIST) has just brought scientists a critical step closer toward a new and improved definition of the kilogram. The […]