Arthur Holly Compton was an American physicist who shared the 1927 Nobel Prize in Physics with C. T. R. Wilson for his discovery of the Compton effect, which demonstrated the particle nature of electromagnetic radiation. It was a significant discovery at the time; the wave nature of light had been well-demonstrated, but the idea that light had both wave and particle properties was not easily accepted. The Nobel Prize in Physics 1927, announced November 10, 1927. Arthur H. Compton (1/2), “for his discovery of the effect named after him”. C.T.R. Wilson (1/2), “for his method of making the paths of electrically charged particles visible by condensation of vapour”. Arthur H. Compton: born 1892, Wooster, OH, USA. C.T.R. Wilson: born 1869, Glencorse, Scotland. Wiki link Wiki link Data: the Nobel Foundation (CC0).