Definition of fine-structure constant in English:

fine-structure constant

noun

Physics

A fundamental and dimensionless physical constant, equal to approximately 1/137, which occurs in expressions describing the fine structure of atomic spectra.
〔物理〕精细结构常数
Example sentencesExamples
- Some of these constants, such as the fine-structure constant, are dimensionless and are not expressed in terms of units.
- Even atomic clocks can detect drifts in the fine-structure constant only over days or, at most, years.
- The researchers concluded that the fine-structure constant might well be constant, and that the variation seen in the prior work was highly unlikely.
- This is interesting, because there are claims that the fine-structure constant, which determines the strength of the electromagnetic interaction, has actually been experimentally observed to be varying with time.
- As already noted, the fine-structure constant controls the spectral patterns made by elements.

Definition of fine-structure constant in US English:

fine-structure constant

noun

Physics

A fundamental and dimensionless physical constant, equal to approximately 1/137, which occurs in expressions describing the fine structure of atomic spectra.
〔物理〕精细结构常数
Example sentencesExamples
- This is interesting, because there are claims that the fine-structure constant, which determines the strength of the electromagnetic interaction, has actually been experimentally observed to be varying with time.
- The researchers concluded that the fine-structure constant might well be constant, and that the variation seen in the prior work was highly unlikely.
- As already noted, the fine-structure constant controls the spectral patterns made by elements.
- Some of these constants, such as the fine-structure constant, are dimensionless and are not expressed in terms of units.
- Even atomic clocks can detect drifts in the fine-structure constant only over days or, at most, years.

单词	fine-structure constant
释义	Definition of fine-structure constant in English: fine-structure constant noun Physics A fundamental and dimensionless physical constant, equal to approximately 1/137, which occurs in expressions describing the fine structure of atomic spectra. 〔物理〕精细结构常数 Example sentencesExamples Some of these constants, such as the fine-structure constant, are dimensionless and are not expressed in terms of units. Even atomic clocks can detect drifts in the fine-structure constant only over days or, at most, years. The researchers concluded that the fine-structure constant might well be constant, and that the variation seen in the prior work was highly unlikely. This is interesting, because there are claims that the fine-structure constant, which determines the strength of the electromagnetic interaction, has actually been experimentally observed to be varying with time. As already noted, the fine-structure constant controls the spectral patterns made by elements. Definition of fine-structure constant in US English: fine-structure constant noun Physics A fundamental and dimensionless physical constant, equal to approximately 1/137, which occurs in expressions describing the fine structure of atomic spectra. 〔物理〕精细结构常数 Example sentencesExamples This is interesting, because there are claims that the fine-structure constant, which determines the strength of the electromagnetic interaction, has actually been experimentally observed to be varying with time. The researchers concluded that the fine-structure constant might well be constant, and that the variation seen in the prior work was highly unlikely. As already noted, the fine-structure constant controls the spectral patterns made by elements. Some of these constants, such as the fine-structure constant, are dimensionless and are not expressed in terms of units. Even atomic clocks can detect drifts in the fine-structure constant only over days or, at most, years.
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