POLYMER EMISSIVITY

Emissivity: A Program for Atomic Emissivity Calculations

Generalized emissivity inverse problem.

Inverse problems have recently drawn considerable attention from the physics community due to of potential widespread applications [K. Chadan and P. C. Sabatier, Inverse Problems in Quantum Scattering Theory, 2nd ed. (Springer Verlag, Berlin, 1989)]. An inverse emissivity problem that determines the emissivity g(nu) from measurements of only the total radiated power J(T) has recently been studi...

Polarization Dependence of Emissivity

where i, r, and t label the incident, reflected, and transmitted waves, respectively. The solution is based on the fact that eq. (1) holds separately for each polarization of the emitted radiation, and is also independent of the angle of the radiation. This result is implicit in Planck’s derivation [5] of Kirchhoff’s law of radiation, and is stated explicitly in [6]. That law describes the ther...

TG35 Emissivity of Blackbody Cavities

Blackbodies are commonly used as a transfer medium in the calibration of radiation thermometers. The ideal blackbody is perfectly isothermal and has an emissivity of precisely 1 at all wavelengths. However, no real material has an emissivity as high as 1, so practical blackbodies are created by forming a cavity, made to be as isothermal as possible, inside a material with a relatively high intr...

Intercomparison of microwave emissivity products

Introduction Conclusions References