A kibble balance produces the most accurate measurement of Planck’s constant, which “relates the energy in one quantum (photon) of electromagnetic radiation to the frequency of that radiation”. This makes the Kibble a measure of mass through E = mc2, hence: the electric kilogram.

A kibble balance produces the most accurate measurement of Planck’s constant, which “relates the energy in one quantum (photon) of electromagnetic radiation to the frequency of that radiation”. This makes the Kibble a measure of mass through E = mc2, hence: the electric kilogram.

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