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.
Facts
Proposed YearSourced to the subject's own account Proposed BySourced to the subject's own account Connections
Proposed By
Additional Source Planck's Law (Wikipedia)History, Finding the empirical law section (edge: proposed-by, Planck)
Sources
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.
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