blackbody


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  • noun

Synonyms for blackbody

a hypothetical object capable of absorbing all the electromagnetic radiation falling on it

References in periodicals archive ?
Max Planck soon benefited from the construction of advanced cavities [9-11], when he formulated the blackbody solution [13,14].
The driving structure module consists of the locking pin housing with two locking pins combined with the mechanical two-way SMA spring actuator, a counterweight for the mass balancing of the driving part, and a tilting plate to mount the calibration equipment, such as a mirror or a blackbody. The base structure module consists of a base frame, ball bearing brackets, a constant-force spring to apply a restoration force on the mechanical driving part during fail-safe operation, and limit switches to monitor and judge the status of each mission mode.
where h (~6.626 x [10.sup.-34] [m.sup.2] x kg x [s.sup.-1]) is Planck's constant, T (K) is the blackbody temperature, k (~1.381 x [10.sup.-23] [m.sup.2] x kg x [s.sup.-2] x [K.sup.-1]) is the Boltzmann constant, [lambda](m) is the wavelength, and c (~2998 x [10.sup.8] m x [s.sup.-1]) is the speed of light.
The curve shows that a small bias over the 2-yr measurements of about 0.0005 W [([m.sup.2] sr [cm.sup.-1]).sup.-1] corresponding to 0.5 K for a blackbody at 240 K is present.
In addition to being excellent blackbody absorbers, carbon nanotube sheets are a fast source of Joule heating [Kwon 2004] and can be utilized to heat the solar collectors when sunlight is not sufficient.
[T.sub.sky] = equivalent blackbody temperature of sky (K or R)
Grigorenko, "Plasmonic blackbody: Almost complete absorption of light in nanostructured metallic coatings," Phys.
where B([lambda], T) is the blackbody spectral radiance at the same temperature T.
The thermal channels of the AVHRR (nominally 3.55 [micro]m-3.93 [micro]m; 10.3 [micro]m-11.3 [micro]m; and 11.5 [micro]m-12.5 [micro]m) are calibrated on orbit from views of cold space and a blackbody in the instrument itself.
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.
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 Planck Radiation Law describes the spectral distribution of blackbody radiation, and the formula is
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.
Subsequent chapters, of course, delve into the specifics, in three groupings pertaining to blackbody radiative properties, radiative exchange in enclosures without any radiating medium between the surfaces, and the radiative properties of gases.