Planck constant
Oxford Dictionary of Chemistry:
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Planck constant
Symbol h. The fundamental constant equal to the ratio of the energy of a quantum of energy to its frequency. It has the value 6.626 0755(40) × 10−34 J s. It is named after Max Planck. In quantum-mechanical calculations the rationalized Planck constant (or Dirac constant) ħ = h/2π = 1.054 589 × 10−34 Js is frequently used.
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Planck constant
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Oxford Dictionary of Chemistry
A Dictionary of Chemistry. Sixth Edition. Copyright © Market House Books Ltd, 2008. All rights reserved.
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