PLANCK Functions & Integrals; methods of computation

10292019, 12:36 PM
(This post was last modified: 10292019 01:39 PM by SlideRule.)
Post: #1




PLANCK Functions & Integrals; methods of computation
Excerpts from PLANCK FUNCTIONS AND INTEGRALS; METHODS OF COMPUTATION, Thomas E. Michels, Goddard Space Flight Center (NASA)
"ABSTRACT Blackbody radiation is investigated with emphasis placed on a solution of the Planck integral … suitable for computer and hand calculation. A computer program using this method has been included as well as graphs and tables of Planck functions and Planck integrals … … INTRODUCTION In practically any area of physics related to radiation pyrometry, spectroscopy, radiative transfer, or any other area of study of electromagnetic radiation, a need for the knowledge of the blackbody spectrum is needed. … With these thoughts in mind, it was realized that it would be beneficial to have available a short concise reference on blackbody radiation, including useful tables of related Planck functions and, as well, a numerical solution for computer and hand calculation of the total intensity seen over a specified range of the spectrum. … A solution of the integral ⌠λ  Βλ,τ dλ ⌡0 is presented for computer and hand calculation, and a listing of a function subprogram employing this method is presented in Appendix D. … Appendix B BlackBody Radiation Constants and Formulas … Appendix C Tables of Normalized Planck Functions, Planck Integrals, Total Intensity, and Maximum Intensity … Appendix D FORTRAN IV Subprogram to compute …" BEST! SlideRule 

10292019, 02:27 PM
Post: #2




RE: PLANCK Functions & Integrals; methods of computation
Very nice, thanks!
It prompted me to search for other sources, like this one: "Integration of Planck's Radiation Equation" Time to digest the theory... 

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