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The fine-structure constant of 1/137 is puzzling and has never been fully explained. When the interaction coefficient is 1/137, the transference number should be 136/137. With the transference number concept, we noticed that we must examine the constant of 1/136 instead of 1/137 to discover an empirical relationship in which the fine-structure constant is related to the mass ratio of electrons and quarks. Then, the physical meaning of this empirical relationship is discussed.

Empirical Relation of the Fine-Structure Constant with the Transference Number Concept