Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium, and its derivation marked the origin of quantum theory.
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Source Planck's Law (Wikipedia)
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Additional Source Planck's Law (Wikipedia)History, Finding the empirical law section (edge: proposed-by, Planck)
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1. Planck's Law (Wikipedia)
WikipediaLead section (entity-description)
Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature.
Lead section (proposed-year)
Max Planck derived the law in 1900 by proposing that energy is emitted or absorbed in discrete packets, or quanta.
Lead section (proposed-by)
Max Planck derived the law in 1900 by proposing that energy is emitted or absorbed in discrete packets, or quanta.
Proposed By: Max Planck, History, Finding the empirical law section (edge: proposed-by, Planck)
In 1900, German physicist Max Planck heuristically derived a formula for the observed spectrum by assuming that a hypothetical electrically charged oscillator in a cavity that contained black-body radiation could only change its energy in a minimal increment.
Belongs To: Physics, Lead sentence
In physics, Planck's law (also Planck radiation law) describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature T, when there is no net flow of matter or energy between the body and its environment.
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