a fundamental and dimensionless physical constant, equal to approx. 1/137, which occurs in expressions describing the fine structure of atomic…
| 单词 | θ79881 |
| 释义 | the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [noun] > basic constant (1) fine-structure constant1923 a fundamental and dimensionless physical constant, equal to approx. 1/137, which occurs in expressions describing the fine structure of atomic… |
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