black body

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Related to Blackbody spectrum: blackbody radiation, Planck spectrum
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  • noun

Synonyms for black body

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

References in periodicals archive ?
The production of a blackbody spectrum absolutely requires the presence of a vibrating lattice and is intrinsically tied to the nature of the walls [4], contrary to Kirchhoff's claim [1,2].
The infrared spectra are automatically averaged and integrated with respect to the blackbody spectrum at selectable temperature range.
It would be exceedingly difficult for any other source to produce radiation with a blackbody spectrum that has the same temperature in every direction.
Stewart recognized that, if he wanted a blackbody spectrum from a cavity, he must have recourse to lampblack.
"The perfect blackbody spectrum virtually ruled out any explanation for the cosmic-microwave background other than the Big Bang," notes cosmologist Michael S.
1 [2], does not require that materials inside the cavity can drive the reflectivity term to eventually "build up" a blackbody spectrum. This is a fundamental distinction with the derivation provided by Max Planck [8, [section]49].
In another controversy, two groups argued for years over which first determined that the radiation has a blackbody spectrum. Also, Ralph A.
Known as the Balloon Anisotropy Measurement, this survey employs a spectrometer, a device normally used to study how closely the intensity of the microwave background at different wavelengths matches a perfect blackbody spectrum. Indeed, the research team previously used the same spectrometer for just that purpose.
That real materials possess reflectivity implies that they cannot generate a blackbody spectrum without driving this reflective component [15].
The Big Bang model predicts that this radiation should have a virtually perfect blackbody spectrum, and this was verified to remarkable accuracy by the Far Infrared Absolute Spectrophotometer (FIRAS) experiment on COBE.
Based on a small sample of data, the measurements so far show no deviations from a blackbody spectrum (see illustration).
where [T.sub.0] is the temperature of the blackbody spectrum today, which is 2.7 K for the CMBR, and [T.sub.emit] the temperature of the emitting plasma.
Spectra will tell the difference: True ZITs will have the blackbody spectrum characteristic of the cosmic microwave background.
Yet, in modeling the blackbody problem, computer simulations often perpetually pump photons into cavities, invoke reflection, and build up radiation until they achieve the blackbody spectrum. But real materials cannot act as perpetual sources of photons without dropping in temperature.
It was not a blackbody spectrum but a line spectrum, Deutsch says.