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Band emission, is the fraction of the total emission from a blackbody that is in a certain wavelength interval or band. For a prescribed temperature, T and the spectral interval from 0 to λ, is the ratio of the total emissive power of a black body from 0 to λ to the total emissive power over the entire spectrum.

\( F_{0,\lambda} = \frac{\int_0^\lambda E_{\lambda,b} d\lambda}{\int_0^\infty E_{\lambda,b} d\lambda} =\frac{\int_0^\lambda E_{\lambda,b} d\lambda}{\sigma T ^4} =\int_0^{\lambda T} \frac{E_{\lambda,b}}{\sigma T ^5} d(\lambda T) = f(\lambda T) \)

See also

Spectral bands

Physics Encyclopedia

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