Planck constant

Variant of Planck's constant

Planck's constant definition

Planck's constant (plaŋks, pläŋks)

Physics a universal constant (h) which gives the ratio of a quantum of radiant energy (E) to the frequency (ν) of its source: it is expressed by the equation E = hν, and its approximate numerical value is 6.626 × 10 joule second
often Planck constant

Etymology: after Max (Karl Ernst Ludwig) Planck

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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