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单词
dirac's constant
释义
Dirac's constant
Dir·ac's constant
D5248250
(dĭ-răks′)
n.
A physical constant often used in quantum mechanics, equal to
h
/
2π
, where
h
equals Planck's constant. Its symbol is ħ. Also called
h-bar
,
reduced Planck's constant
.
[After Paul Adrien Maurice
Dirac
.]
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更新时间:2026/4/16 16:06:03