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2 q&more articles about the topic silicon

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How the Avogadro constant was measured for the last time

Determining the basis for the redefinition of the units kilogram and mole

Since the 20th of May 2019, the mass unit kilogram is no longer defined by the international kilogram prototype but by the numerical value of the Planck constant, the most important fundamental constant in quantum physics. For this definition, the Planck constant needed to be measured with the ...

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The Best Measurement

Milestones on the path to a new definition of the kilogram

It is now more than 30 years since attempts started to find a way of defining the kilogram based on an atomic constant or a fundamental physical constant. Since then, two methods have advanced sufficiently far to make it likely that there will be a new definition within the coming years, namely ...

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