hbar

Reduced Planck constant, Planck constant over 2pi.

Syntax
value = hbar
[value,sigma] = hbar
Description

hbar returns the value of the reduced Planck constant, h/(2*pi), in SI units (joule*seconds) in value and the standard deviation in sigma (if two output arguments are specified).

Reference

The value and the standard deviation are taken from the 2018 CODATA collection of recommended values.

See also

amu, angstrom, avogadro, barn, bmagn, bohrrad, boltzm, clight, echarge, emass, eps0, evolt, faraday, gammae, gfree, hartree, molgas, mu0, nmagn, nmass, planck, pmass, rydberg