Four Fundamental Constants values are changing

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Fundamental Constants values are changing

Physicists around the world have revised the values of the electron’s charge, the Boltzmann constant, the Planck Constant, and the Avogadro constant. All of which will play an important role in how we measure things.

The fine-tuning of these quantities proposed by the International Committee for Weights and Measures. It is voted upon at the General Conference of Weights and Measures in November 2018. Further, the vote will see an important shift in the way things are officially measured, a move that’s been years in the making.

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The updated values obtained by the Committee on Data for Science and Technology (CODATA) Task Group on Fundamental Constants (TGFC). The electron’s charge will help redefine the ampere, the unit of electrical current.However, the Boltzmann constant used in thermodynamics and will help to redefine the Kelvin, the international unit for temperature. The Planck constant the one people really excited a key to the redefinition of the kilogram.

The changes to officially roll out on May 20, 2019, which is World Metrology Day.

“The values of these four constants won’t change anymore,” Peter Mohr, a scientist at the National Institute of Standards and Technology (NIST) and a member of the CODATA TGFC, said in a statement. “The whole thing geared to not have any impact on the average person.”

Meanwhile, the impacts felt in the science world. The way the classic units measured. Make more precise observations at the extreme ends of the scales. Tiny masses and extremely low temperatures will have a lot less uncertainty when measured.

“It’s a broader philosophical paradigm shift,” Mohr added. “When the speed of light became a fixed number, researchers stopped measuring the speed of light. Moreover, they focused on realizing the meter.

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Finally, it’s the same with the Planck constant. You’re not going to be measuring the Planck constant anymore.  You’re going to be realizing mass and electrical standards more precisely.”

[source: iflscience]