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The relative energy density distribution of equilibrium radiation on
NOMOGRAMS for determining the fractions and densities of energy and photons
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absorbing power absorption coefficient actual temperature amount of energy black body radiation calculated cavity cm cm cm/sec considered corresponding cubic centimetre defined density of equilibrium density of radiation determined dielectrics direction of propagation distribution of equilibrium energy and photon energy density equal equation 116 equi EQUILIBRIUM RADIATION SPECTRA example expression flux density flux of equilibrium flux through unit follows frequency scale G1TTL given direction given in Fig graph hemispherical flux Hence integral isotropic Kirchhoff's law Leningrad State University librium logarithmic scale mean energy Nauk nomograms non-dimensional scale non-equilibrium radiation number of photons obtain photon density photon distribution photons of equilibrium Planck's formula Planck's function radiation density radiation energy ratio relation relative non-dimensional solid angle spectroscopic spectrum Stefan-Boltzmann law Stepanov substance Substituting surface tables tion total emissive power total flux total thermodynamic equilibrium unit area unit frequency interval unit volume unity variables wave length scale