Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License.
 noun physics a body that
radiates energy having ablackbody distribution reduced by aconstant factor
Etymologies
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Examples

This is a major problem with applying the the graybody StefanBoltzman approach to an object that is not a graybody.

Earth is not a graybody, effects at specific narrow wavelength bands are important, heat transport and altitude effects matter, the surface is not the top of atmosphere, and so on – so it is not appropriate to ignore all this and rely on SB for calculations of surface temperatures.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.

For a graybody one adds an emissivity term, and for a real body one adds a wavelength or frequency subscript to the emissivity term and accounts for the fraction of radiation output in the range of interest.
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