释义 |
Dirac constant
Dirac constant n (Atomic Physics) a constant used in quantum mechanics, equal to the Planck constant divided by 2π. It has a value of 1.054571596±0.000000078 × 10–34 joule seconds. Symbol: ħ or ẖ Also called: crossed-h or h-bar EncyclopediaSeePlanck constant |