Coblentz, William Weber (kōˈblĕnts) [key], 1873–1962, American physicist, b. North Lima, Ohio, grad. Case School of Applied Science (B.S., 1900) and Cornell (Ph.D., 1903). From 1905 to 1945 he was physicist with the National Bureau of Standards. He was the first to verify Planck's law, and he conducted valuable researches on infrared and ultraviolet radiation, the measurement of stellar radiation and planetary temperatures, and the optical properties of iodine.
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