Polykarp Kusch, German-American physicist and academic, Nobel Prize laureate (died 1993)

Polykarp Kusch was a German-American physicist who shared the 1955 Nobel Prize in Physics with Willis Eugene Lamb for his accurate determination that the electron magnetic moment was greater than its theoretical value, thus leading to reconsideration of and innovations in quantum electrodynamics.

The Nobel Prize in Physics is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901, the others being the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine. Physics is traditionally the first award presented in the Nobel Prize ceremony.