An experiment designed to measure the spectral emissivity of tungsten, in which a direct comparison method is utilized so that the spectral emissivity is observed directly as the ratio of light intensity from a tungsten source to that from a blackbody source, is described. The spectral emissivity was measured over the wavelength interval 310 mμ to 800 mμ, and the temperature interval 1600°K to 2400°K.
© 1959 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.