This fundamental constant of nature remains the same even near a black hole
The fine-structure constant determines the strength of electromagnetic interactions

A gang of stars circles the supermassive black hole at the center of the Milky Way (orbits illustrated). Scientists observed five such stars to show that the fine-structure constant is the same near a black hole as it is on Earth.
ESO/L. Calçada/spaceengine.org (CC BY 4.0)