Entropy of radiation: the unseen side of light

Abstract Despite the fact that 2015 was the international year of light, no mention was made of the fact that radiation contains entropy as well as energy, with different spectral distributions. Whereas the energy function has been vastly studied, the radiation entropy distribution has not been anal...

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Main Author:	Alfonso Delgado-Bonal
Format:	article
Language:	EN
Published:	Nature Portfolio 2017
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/7aa80565711a40ea94cbb04c44e2ff5a
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id	oai:doaj.org-article:7aa80565711a40ea94cbb04c44e2ff5a
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spelling	oai:doaj.org-article:7aa80565711a40ea94cbb04c44e2ff5a2021-12-02T11:53:04ZEntropy of radiation: the unseen side of light10.1038/s41598-017-01622-62045-2322https://doaj.org/article/7aa80565711a40ea94cbb04c44e2ff5a2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01622-6https://doaj.org/toc/2045-2322Abstract Despite the fact that 2015 was the international year of light, no mention was made of the fact that radiation contains entropy as well as energy, with different spectral distributions. Whereas the energy function has been vastly studied, the radiation entropy distribution has not been analysed at the same speed. The Mode of the energy distribution is well known –Wien’s law– and Planck’s law has been analytically integrated recently, but no similar advances have been made for the entropy. This paper focuses on the characterization of the entropy of radiation distribution from an statistical perspective, obtaining a Wien’s like law for the Mode and integrating the entropy for the Median and the Mean in polylogarithms, and calculating the Variance, Skewness and Kurtosis of the function. Once these features are known, the increasing importance of radiation entropy analysis is evidenced in three different interdisciplinary applications: defining and determining the second law Photosynthetically Active Radiation (PAR) region efficiency, measuring the entropy production in the Earth’s atmosphere, and showing how human vision evolution was driven by the entropy content in radiation.Alfonso Delgado-BonalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alfonso Delgado-Bonal Entropy of radiation: the unseen side of light
description	Abstract Despite the fact that 2015 was the international year of light, no mention was made of the fact that radiation contains entropy as well as energy, with different spectral distributions. Whereas the energy function has been vastly studied, the radiation entropy distribution has not been analysed at the same speed. The Mode of the energy distribution is well known –Wien’s law– and Planck’s law has been analytically integrated recently, but no similar advances have been made for the entropy. This paper focuses on the characterization of the entropy of radiation distribution from an statistical perspective, obtaining a Wien’s like law for the Mode and integrating the entropy for the Median and the Mean in polylogarithms, and calculating the Variance, Skewness and Kurtosis of the function. Once these features are known, the increasing importance of radiation entropy analysis is evidenced in three different interdisciplinary applications: defining and determining the second law Photosynthetically Active Radiation (PAR) region efficiency, measuring the entropy production in the Earth’s atmosphere, and showing how human vision evolution was driven by the entropy content in radiation.
format	article
author	Alfonso Delgado-Bonal
author_facet	Alfonso Delgado-Bonal
author_sort	Alfonso Delgado-Bonal
title	Entropy of radiation: the unseen side of light
title_short	Entropy of radiation: the unseen side of light
title_full	Entropy of radiation: the unseen side of light
title_fullStr	Entropy of radiation: the unseen side of light
title_full_unstemmed	Entropy of radiation: the unseen side of light
title_sort	entropy of radiation: the unseen side of light
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7aa80565711a40ea94cbb04c44e2ff5a
work_keys_str_mv	AT alfonsodelgadobonal entropyofradiationtheunseensideoflight
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Entropy of radiation: the unseen side of light

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