Emissivity of Liquid Sodium

Liquid-Liquid Extraction Study of Sodium and Potassium Ions by a Series of Non Cyclic Ionophores Composed of Furan Units

A new series of noncyclic ionophores containing two to four furan units (Ia to IIIb) i.e. 1,1-difurylethane (Ia), 2,5-bis(methylfurfuryl)furan (IIa) and 1,1’ ethyledenebis[5-(methylfurfuryl)furan] (IIIa), 2,2-difurylpropane (Ib), 2,5-bis (dimethylfurfuryl)furan(IIb), 2,2’-isopropylidenebis[5-(dimethylfurfuryl)furan] (IIIb) have been synthesized by the condensation of furan with acetaldehyde and...

Emissivity: A Program for Atomic Emissivity Calculations

Radial Distribution Function of Liquid Sodium

The radial distribution function of liquid sodium has been studied by considering the integral equation Perturbation Theory of Madden and Fitts for the reference part and the optimised cluster theory for the attractive part of the pair potential. Calculations were carried out for the long range oscillatory potential of Schiff. The calculated results are compared with the molecular dynamics calc...

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...