Planck constant.
h = planck
planck
returns the value of the Planck constant in SI units (J/Hz = J s) in h
.
The value is taken from the 2018 CODATA collection of recommended values.
amu, angstrom, avogadro, barn, bmagn, bohrrad, boltzm, clight, echarge, emass, eps0, evolt, faraday, gammae, gfree, hartree, hbar, molgas, mu0, nmagn, nmass, pmass, rydberg