News tagged with international system of units

Graphene joins the race to redefine the ampere

A new joint innovation by the National Physical Laboratory (NPL) and the University of Cambridge could pave the way for redefining the ampere in terms of fundamental constants of physics. The world's first ...

May 12, 2013
4.7 / 5 (17) 7 | with audio podcast

Explained: Femtoseconds and attoseconds

Back in the first half of the 20th century, when MIT's famed Harold "Doc" Edgerton was perfecting his system for capturing fast-moving events on film, the ability to observe changes unfolding at a scale of ...

Sep 18, 2012
4.3 / 5 (4) 0

Toward a global microwave standard

Much of what is known about decadal climate change – and much of what appears on the evening weather forecast as well – comes from satellite-based remote sensing of microwave radiation at different ...

Feb 06, 2012
5 / 5 (1) 0