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 graphene single-electron ...
Nanomaterials
May 12, 2013
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A new measurement approach proposed by scientists at the National Institute of Standards and Technology (NIST) could lead to a better way to calibrate computed tomography (CT) scanners, potentially streamlining patient treatment ...
General Physics
Mar 1, 2019
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198
Almost 200 years ago, Bavarian physicist Joseph von Fraunhofer discovered dark lines in the sun's spectrum. It was later discovered that these spectral lines can be used to infer the chemical composition and temperature of ...
Quantum Physics
Jul 8, 2013
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The guardians of the world's most important standards of weights and measures have turned to the weird universe of quantum physics to try to resolve a dilemma.
General Physics
Nov 6, 2011
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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 (NIST) has ...
General Physics
Jul 20, 2011
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Scientists said Monday they were moving closer to coming up with a non-physical definition of the kilo after discovering the metal artefact used as the international standard had shed a little weight.
General Physics
Jan 24, 2011
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The need for a smaller, more transportable version of ANSTO's 1,500-liter atmospheric radon-222 monitor, and with a calibration traceable to the International System of Units, prompted the team to develop a 200-liter radon ...
Environment
May 5, 2023
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10
Scales aren't changing and the weather won't be noticeably different, but on May 20 the definitions that underlie what your scale and thermometer report—along with standard definitions used in chemistry and electronics—are ...
General Physics
May 21, 2019
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12
We measure stuff all the time—how long, how heavy, how hot, and so on—because we need to for things such as trade, health and knowledge. But making sure our measurements compare apples with apples has been a challenge: ...
General Physics
May 20, 2019
0
131
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 microseconds—millionths ...
General Physics
Sep 18, 2012
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