26/01/1911 German-American physicist Polykarp Kusch is born
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Polykarp Kusch
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Electron Magnetic Dipole Moment and Bohr Magneton
He measured the the magnetic moment of the electron (quantity that determines the torque it will experience in an external magnetic field). The result was greater than theoretical value. It led to many innovations physical theory about interactions of matter and electromagnetic radiation, the quantum electrodynamics.