blackbody


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black·bod·y

 (blăk′bŏd′ē)
n. pl. black·bod·ies
A theoretically perfect absorber of all incident radiation.

black•bod•y

(ˈblækˈbɒd i)

n., pl. -bod•ies.
a hypothetical body that absorbs without reflection all of the electromagnetic radiation incident on its surface.
[1700–10]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blackbody - a hypothetical object capable of absorbing all the electromagnetic radiation falling on it; "a black body maintained at a constant temperature is a full radiator at that temperature because the radiation reaching and leaving it must be in equilibrium"
natural object - an object occurring naturally; not made by man
References in periodicals archive ?
To begin his investigation, Kirchhoff, in the first section of his text, defined a blackbody as follows [7, [section] 1]:
Moreover, we used the real IR emitter spectral emission obtained from out supplier to approximate the emission of the IR emitter instead of using the blackbody theory.
One of the puzzling results of the calibrations was that, for each instrument, the brightness temperature of its internal calibration target (ICT), determined radiometrically by the instrument itself after it had been calibrated against ITT's laboratory blackbody, differed from its temperature as indicated by the PRTs embedded in it.
The text opens by discussing the observations and technical limits of known climatology, including long-term variability, then introducing the relevance of blackbody radiation modeling and thermodynamics to understanding the climate system.
air pollution, weather) and surface emissivity (the ratio of the radiation emitted by a surface to the radiation emitted by a blackbody at the same temperature: i.
In the case of a non-adiabatic moving blackbody, others found that the same transformation law applied as well (Liu, 1992).
omega]0]--spectral intensity of blackbody radiation, W/(m ster); k--conduction; k+r--conduction and radiation; [k.
Given the lack of recognition for Hasenohrl's contribution, they examined the Austrian physicist's original work on blackbody radiation in a cavity with perfectly reflective walls.
All practical light sources are represented, including 17 filament, 68 mixed LED, 159 phosphor LED, 106 fluorescent, 31 high-intensity discharge, 8 temperatures of blackbody radiation, 6 phases of CIE daylight, and 6 miscellaneous illuminants.
The property [epsilon] is defined as the emissivity of the surface and is the ratio of the energy emitted from the surface relative to that of a blackbody at the same temperature.
The first key insight was that closed trapped surfaces, discovered by Roger Penrose in the black hole case, would occur in a time reversed sense in cosmology; and the second was that one could show such closed trapped surfaces would exist because of the existence of the cosmic microwave blackbody radiation.