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Gray Atmosphere

(a model atmosphere whose opacity does not depend upon wavelength)

A Gray Atmosphere is the term for a model of an Atmosphere regarding its Opacity that ignores the differences in opacity at different Wavelengths. It is a simplification used when incorporating opacity in more complex models (e.g., Stellar Structure) in order to keep the entire model from becoming unwieldy. Typically it uses a determination of the Rosseland Mean Opacity.


Referenced by:
Rosseland Mean Opacity
Equation of Radiative Transfer (RTE)
Stellar Structure