Abstract

The fractional deviation from blackbody radiation due to wall emissivity ∊ modestly differing from unity and due to the presence of a temperature gradient (dT/dx) at the open end of a specularly reflecting semi-infinite cylinder of diameter D and end temperature T₁ is shown to be $\left(\frac{16}{3}\right)\hspace{0.17em}\left(\frac{2-∊}{∊}\right)\hspace{0.17em}\frac{d(T/T_1)}{d(x/D)}$.

© 1974 Optical Society of America

Radiometric Properties of Isothermal, Diffuse Wall Cavity Sources

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Specularly vs Diffusely Reflecting Walls for Cavity-Type Sources of Radiant Energy

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Transmission Characteristics of Specularly Reflecting Light Pipes Uniformly Irradiated by Obliquely Inclined Rays

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