This is a list of notable Jewish American physicists. For other Jewish Americans, see Lists of Jewish Americans. Stephen Brunauer, Hungarian physicist who came to United States to study sciences. Inventor of BET theory and porous Portland cement. Albert Einstein, German-born, later naturalized American theoretical physicist who is known for developing the theory of relativity. Nobel Prize (1921). Richard P. Feynman, physicist, Nobel Prize (1965) (though he always refused to appear in lists such as this one and other lists or books that classified people by race) Cornelius Lanczos, mathematical physicist Albert A. Michelson, who measured the speed of light,and disproved the existence of the luminous ether. J. Robert Oppenheimer, "the father of the atomic bomb" Carl Sagan, one of the most prominent astrophysicists who is known for his research on the possibility of extraterrestrial life. Eric Weinstein (born 1965), mathematical physicist Victor Frederick Weisskopf (1908–2002), physicist; during World War II, he worked at Los Alamos on the Manhattan Project to develop the atomic bomb, and later campaigned against the proliferation of nuclear weapons