fine-structure constant معنى"fine-structure constant" أمثلة على "constant" معنى "fine structure" معنى "constant" معنى "be fine" معنى "fine" معنى "structure" معنى "deep structure and surface structure" معنى "alexandre constant" معنى "ashton constant" معنى "astronomical constant" معنى "avogadro constant" معنى "benjamin constant" معنى "binding constant" معنى "boltzmann constant" معنى "bryan constant" معنى "catalan's constant" معنى "champernowne constant" معنى "christian constant" معنى "conic constant" معنى "constant (mathematics)" معنى "constant bearing" معنى "constant bucher" معنى "constant capital" معنى "constant collet" معنى "constant djakpa" معنى أمثلة The first physical interpretation of the fine-structure constant α was as the ratio of the velocity of the electron in the first circular orbit of the relativistic Bohr atom to the speed of light in the vacuum.
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