Planck's radiation law
Sell, Heinz G. Metals Development Section, Westinghouse Lamp Divisions, Bloomfield, New Jersey.
Walsh, Peter J. Department of Physics, Fairleigh Dickinson University, Teaneck, New Jersey.
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A law of physics which gives the spectral energy distribution of the heat radiation emitted from a so-called blackbody at any temperature. Discovered by Max Planck early in the twentieth century, this law laid the foundation for the advent of the quantum theory because it was the first physical law to postulate that electromagnetic energy exists in discrete bundles, or quanta. See also: Heat radiation; Quantum mechanics
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