News tagged with fundamental constant
Atomic clock comparison via data highways
(Phys.org) -- Optical atomic clocks measure time with unprecedented accuracy. However, it is the ability to compare clocks with one another that makes them applicable for high-precision tests in fundamental ...
Apr 27, 2012 |
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Is graphene the best quantum resistance standard?
New research from NPL's Quantum Detection Group presents the most precise measurements of the quantum Hall effect ever made, using the two-dimensional material graphene.
Sep 19, 2011 |
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The constants they are a changin': NIST posts latest adjustments to fundamental figures
The electromagnetic force has gotten a little stronger, gravity a little weaker, and the size of the smallest "quantum" of energy is now known a little better. The National Institute of Standards and Technology ...
Jul 20, 2011 |
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First app from NPL to help researchers working in the lab
The UK's National Physical Laboratory (NPL) has released its first app for iOS devices such as iPhones and iPads. It will provide researchers with easy and up-to-date access to the values for all the physical constants.
Nov 17, 2010 |
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Accurate Avogadro constant may help redefine the kilogram
(PhysOrg.com) -- A new accurate determination of the Avogadro constant has used the method of "counting" the atoms in a 1 kg sample of an almost perfect silicon sphere highly enriched with the isotope 28Si. They used ...
Oct 20, 2010 |
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Variations in fine-structure constant suggest laws of physics not the same everywhere
(PhysOrg.com) -- One of the most controversial questions in cosmology is why the fundamental constants of nature seem fine-tuned for life. One of these fundamental constants is the fine-structure constant, ...
Sep 06, 2010 |
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Math theories may hold clues to origin, future of life in universe
How did we get here and where are we headed? These are some of life's biggest questions. To get the answers, one Kansas State University professor is doing the math.
Jun 09, 2009 |
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Goal: developing the best atomic clock in the world
They are masters at working with light: the scientists at the newly founded QUEST Institute at the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig. And they want to work on some of the most exciting questions relating ...
May 29, 2009 |
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