| 单词 | fine-structure constant |
| 释义 | > as lemmasfine-structure constant fine-structure constant n. Physics a fundamental and dimensionless physical constant, equal to approx. 1/137, which occurs in expressions describing the fine structure of atomic spectra.The fine-structure constant is typically denoted by the symbol α. ΚΠ 1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines viii. 497 Our representation of the L-doublet is fully determined and expressed rationally by the fine-structure constant [Ger. Feinstrukturkonstante]..by the Rydberg frequency..and by the nuclear charge. 1970 Sci. Amer. Oct. 63/1 The fine-structure constant is the basic constant of quantum electrodynamics. 2006 F. Wilczek Fantastic Realities 129 The numerical value of the fine-structure constant, a conceptual gold nugget ardently pursued by Arthur Eddington and Wolfgang Pauli, has lost its luster. < as lemmas |
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