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Effect of Surface Roughness on Emittance of Nonmetals

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Abstract

It has been observed experimentally, both at NBS and elsewhere, that the emittance of polished metals can be markedly increased by roughening the surface, by as much as a factor of 2 or 3. For nonmetals and particularly white ceramic materials, on the other hand, the emittance appears to be essentially independent of surface roughness, at least for wavelengths below 7 or 8 μ. This apparant anomaly is explained on the basis of the differences in the optical properties of the two types of materials.

© 1966 Optical Society of America

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Corrections

Joseph C. Richmond, "Erratum: Effect of Surface Roughness on Emittance of Nonmetals," J. Opt. Soc. Am. 60, 1703_1-1703 (1970)
https://opg.optica.org/josa/abstract.cfm?uri=josa-60-12-1703_1

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