KnowraFine-structure constantLinked fromLinked fromThe 17 pages that link to Fine-structure constant, each with the reason it gives.All 17Broader topic 3Related 14Quantum electrodynamicsBroader topic: It sets the scale of QED interaction corrections and organizes perturbative calculations.Physical constantBroader topic: It quantifies electromagnetic coupling without depending on units.Mathematical constantBroader topic: It is a notable example of a constant that links mathematical form to physical measurement.