Planck's constant
Planck's constant
noun \ˈpläŋ(k)s-, ˈplaŋ(k)s-\Definition of PLANCK'S CONSTANT
: a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an approximate value of 6.626 × 10−34 J·s —symbol h
Origin of PLANCK'S CONSTANT
Max K. E. L. Planck
First Known Use: 1910
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