fine-structure-constant Definition and 1 Threads

The fine-structure constant α appears whenever the electron resists forced reorientation by an external field: - Anomalous moment: precession deficit per cycle, ##(g-2)/2 = \alpha/(2\pi) + \ldots## - Zeeman: forcing the spin to align with ##B## costs energy ##\Delta E = g,\mu_B,B,m_s##; the...