- Alternative form of Planck's constant.
Variant of Planck's constant
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
Origin of Planck's constantafter Max (Karl Ernst Ludwig) Planck