“Sommerfeld's fine-structure theory was generally considered to be excellently and unambiguously confirmed by experiment. Because the theory rested on the foundation provided by Bohr, the experiments were also taken as strong support for his theory of atomic structure.” History Of ScienceFine Structure ConstantHistory Of Physics Book:Niels Bohr and the Quantum Atom: The Bohr Model of Atomic Structure 1913-1925 Source: Niels Bohr and the Quantum Atom: The Bohr Model of Atomic Structure 1913-1925