Concerning the adequacy of the emissivity model to experimental data when determining the true temperature of an opaque material by the thermal radiation spectrum

Abstract

When determining the thermodynamic (true) temperature of an opaque material by the thermal radiation spectrum, the parametric model of spectral emissivity is chosen so that this model and sought material temperature can be considered adequate to the initial experimental data. The possible adequacy conditions are analyzed. The process of choosing a model on the basis of experimental data published for a tungsten sample heated in vacuum at a constant temperature is considered as an example.