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Adding short description: "Photon field that fills our universe" |
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{{Short description|Photon field that fills our universe}}
{{one source |date=March 2024}}
[[Image:Extragalactic-background-power-density.jpg|thumb|321px|right|Schematic representation of the spectral energy distribution of the DEBRA. The dependent quantity is the [[spectral radiometric quantity|spectral]] [[spectral radiance|radiance]] multiplied by [[wavelength]], i.e. ''λL''<sub>e''λ''</sub>.
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