Volume 95 Issue 28 | p. 10 | Concentrates
Issue Date: July 10, 2017

Boltzmann and Planck constants remeasured

Values will contribute to defining basic units of measure through fundamental constants instead of using physical objects
Department: Science & Technology
Keywords: Analytical chemistry, Physical chemistry, Boltzmann, Planck, SI

NIST has announced more accurate measurements of the Boltzmann and Planck constants. The new values will contribute to an international effort to move away from defining basic units using physical objects and instead, starting in 2019, derive them from seven fundamental constants of nature. The kelvin, for example, . . .

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