Planck's constant pâyâ-ye Planck (#) Fr.: constante de Planck A physical constant that determines the energy of quantum as a function of its frequency. Denoted by h, and being 6.624 x 10^{-27} erg-sec, it is of vital importance in quantum physics. The reduced Planck's constant ħ = h / 2π is also called the → Dirac's constant. |
reduced Planck's constant pâyâ-ye Planck-e bâzhâzidé Fr.: constante de Planck réduite The Planck's constant divided by 2π and denoted ħ, pronounced h-bar. Also called → Dirac's constant. Reduced, p.p. of → reduce; → Planck's constant. |