Volume 97, Number 3, February 2012
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||06 February 2012|
New insights into black bodies
Astronomical Observatory of the University of Valencia (OAUV) - Ed. Instituts d'Investigació, Parc Científic, C/Catedrático José Beltrán 2, E-46980 Paterna, Valencia, Spain, EU
Accepted: 2 January 2012
Planck's law describes the radiation of black bodies. The study of its properties is of special interest, as black bodies are a good description for the behavior of many phenomena. In this work a new mathematical study of Planck's law is performed and new properties of this old acquaintance are obtained. As a result, the exact form for the locus in a color-color diagram has been deduced, and an analytical formula to determine with precision the black-body temperature of an object from any pair of measurements has been developed. Thus, by using two images of the same field obtained with different filters, one can compute a fast estimation of black-body temperatures for every pixel in the image, that is, a new image of the black-body temperatures for all the objects in the field. Once these temperatures are obtained, the method allows, as a consequence, a quick estimation of their emission in other frequencies, assuming a black-body behavior. These results provide new tools for data analysis.
PACS: 44.40.+a – Thermal radiation / 95.75.Mn – Image processing (including source extraction)
© EPLA, 2012
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