Planck constant
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The Planck constant, or Planck's constant, denoted by h, is a fundamental physical constant of foundational importance in quantum mechanics: a photon's energy is equal to its frequency multiplied by t
Plaque at the Humboldt University of Berlin: "Max Planck, the discoverer of the elementary quantum of action h, taught in this house from 1889 to 1928."
Planck units
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In particle physics and physical cosmology, Planck units are a system of units of measurement defined exclusively in terms of four universal physical constants: c, G, ħ, and kB. Expressing one of thes
Planck constant
…List of scientists whose names are used in physical constants Planck units Wave–particle duality…
Max Planck in 1933