The Planck constant h, in the expoent of the black body spectral distribution equation tamed the ultraviolet catastrophy to produce distribution curves such as shown in the Fraunhofer stamp of radiation from the sun. Planck received the 1918 Nobel prize in physics, and Einstein and Bohr applied quantum theory to the photoeletric effect and atomic structure, explaining away some bafling paradoxes of classical physics. The German stamp shows a black body emitting a quantized amount of energy, while the spectrum of this radiation appears continuous to the eye. Planck's constant also commemorates the anniversary of his death in 1947.