Planck's law


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Planck's law

n
(General Physics) physics a law that is the basis of quantum theory, which states that the energy of electromagnetic radiation is confined to indivisible packets (quanta), each of which has an energy equal to the product of the Planck constant and the frequency of the radiation

Planck's law

The principle that lectromagnetic radiation consists of units (quanta or photons).
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Planck's law - (physics) the basis of quantum theory; the energy of electromagnetic waves is contained in indivisible quanta that have to be radiated or absorbed as a whole; the magnitude is proportional to frequency where the constant of proportionality is given by Planck's constant
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
References in periodicals archive ?
When he started talking of Planck's law and radiation emissions, the things flew above our non-scientific heads and we nodded energetically to fake understanding.
The first-order response of the surface temperature to the absorbed solar flux follows the blackbody emission T = [(F/[sigma]).sup.1/4] (Planck's law), where a is the Stefan-Boltzmann constant.
Does it, as Kirchhoff and Planck maintain, equal the intensity of black radiation which we can now quantify according to Planck's Law of 1914; or does the radiation density in the cavity fall short of the black body level at some or all frequencies because of the imperfect absorption and emission of the object in the cavity, as Robitaille claims?
Because a black body is considered the most efficient heat emitter possible, there should be no going beyond the emissions predicted by Planck's law.
Lab technicians Jim Bur and Jonathan Rivera measured four to 10 times the maximum for radiation from an ideal body as predicted by Planck's Law of Blackbody Cavity Radiation.
According to Lin, their "results do not necessarily break Planck's Law, but only modifies it by demonstrating the creation of a new class of emitters." However, researchers such as Kazuaki Sakoda at Japan's Nanomaterials Laboratory in the National Institute of Materials Science adds, "This is one of the most important issues in contemporary optics.