Fine Structure Constant: Fundamental numerical constant of atomic physics and quantum electrodynamics, defined as the square of the charge of the electron divided by the product of Planck's constant and the speed of light.
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About Steven Weinberg
Steven Weinberg was a 20th-century American theoretical physicist. Steven Weinberg was an American theoretical physicist. He shared the 1979 Nobel Prize in Physics with Abdus Salam and Sheldon Glashow "for their contributions to the theory of the unified weak and electromagnetic interaction between elementary particles, including, inter alia, the prediction of the weak neutral current". Read more on Wikipedia →