Fractional Blackbody Emissive Power Solver. By: David Wheeler & William Tryon November 30, 2011. Introduction. It is often necessary to know the fraction of the total emission from a blackbody that is in a certain wavelength interval or band.
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By: David Wheeler & William Tryon
November 30, 2011
The fraction of the radiation between the specified wavelengths
Define the temperature of the diffuse surface
Define up to three wavelengths of interest
If desired, enter the spectral, normal emissivity for the specified range
Press Run! at any time to update the calculations
Total emissive power
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ε = 0.40 for 0 < λ < 2μm
ε = 0.80 for 2 < λ < 5μm
ε = 0 for λ > 5μm
Determine the total hemispherical emissivity and the
total emissive power.