Image:Spectrum of blue sky.png

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Summary

Spectrum of blue sky somewhat near the horizon pointing east at around 3 or 4 pm on a clear day. Spectrum was taken using an Ocean Optics HR2000 spectrometer with a high-OH solarization-resistant fiber optic light guide. this spectrum is NOT BY ANY MEANS IDEAL and was taken from inside a laboratory through probably 4 panes of window glass, thus completely attenuating virtually all radiation below 400nm also the end of the fibre optic was not coupled to any collimating optics thus there may be some slight skewing of the spectrum due to diffuse reflections off surrounding buildings and trees etc. Because the response of the CCD detector in the spectrometer is not linear the spectrum in the infrared region is also less than what is actually present in sunlight; the blackbody spectrum of sunlight continues much further into the infrared than is shown here. I have edited the spectrum to include the locations of the Fraunhofer lines and the water absorption band around ~720 nm. (older image with Fraunhofer lines not indicated is archived as the same name (below)) Spectrum taken by me. This spectrum is not calibrated for intensity.

Originally uploaded as "Spectrum of blue sky.gif" on 14 Oct 2006 by Deglr6328 with the above comments. This new version is in the PNG format and is the exact same quality as the original but with a smaller file size.

Licensing

GNU head Deglr6328, the creator of this work, has granted (or hereby grants) permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation License."

File history

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  • (del) (cur) 06:15, 23 December 2006 . . Remember the dot ( Talk | contribs) . . 2501×1596 (72,462 bytes) (Spectrum of blue sky somewhat near the horizon pointing east at around 3 or 4 pm on a clear day. Spectrum was taken using an Ocean Optics HR2000 spectrometer [http://www.oceanoptics.com/] with a high-OH solarization-resistant fibre optic light guide. this)

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  • Sunlight
  • Diffuse sky radiation
  • Fraunhofer lines
  • User:Deglr6328
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