Willis Eugene Lamb Jr. was an American physicist who was able to precisely determine a surprising shift in electron energies in a hydrogen atom, known as the Lamb shift. For this work, Lamb shared the 1955 Nobel Prize in Physics with Polykarp Kusch. He was a professor at the University of Arizona College of Optical Sciences. The Nobel Prize in Physics 1955, announced November 2, 1955. Willis E. Lamb (1/2), “for his discoveries concerning the fine structure of the hydrogen spectrum”. Polykarp Kusch (1/2), “for his precision determination of the magnetic moment of the electron”. Willis E. Lamb: born 1913, Los Angeles, CA, USA. Polykarp Kusch: born 1911, Blankenburg, Germany. Wiki link Wiki link Data: the Nobel Foundation (CC0).