Absorption of sunlight by atmospheric sodium

A photometer has been built which is sensitive only to light in a very narrow spectral region near the sodium D-line8. The light is scattered by sodium vapour at low density and the scattered light recorded by a photoelectric spectrometer. The latter resolves the two lines and allows the effect of s...

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Bibliographic Details
Main Author:	Scrimger, Joseph Arnold
Other Authors:	Currie, B. W.
Format:	Others
Language:	en
Published:	University of Saskatchewan 2011
Online Access:	http://library.usask.ca/theses/available/etd-10312011-130541/

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spelling	ndltd-USASK-oai-usask.ca-etd-10312011-1305412013-01-08T16:35:15Z Absorption of sunlight by atmospheric sodium Scrimger, Joseph Arnold A photometer has been built which is sensitive only to light in a very narrow spectral region near the sodium D-line8. The light is scattered by sodium vapour at low density and the scattered light recorded by a photoelectric spectrometer. The latter resolves the two lines and allows the effect of stray light to be eliminated. With sunlight the radiation detected is at the bottom of the Fraunhofer lines and the residual intensity there may be measured. It is found that this intensity decreases slightly (relative to the continuum) as the sun approaches the horizon. This effect is attributed to atmospheric sodium; the amount found by this method agrees well with that deduced from twilight measurements made the same day. Currie, B. W. Hunten, D. M. Haslam, R. N. H. Jones, A. McCallum, K. J. Spinks, J. W. T. Douglas, A. E. University of Saskatchewan 2011-10-31 text application/pdf http://library.usask.ca/theses/available/etd-10312011-130541/ http://library.usask.ca/theses/available/etd-10312011-130541/ en unrestricted I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.
collection	NDLTD
language	en
format	Others
sources	NDLTD
description	A photometer has been built which is sensitive only to light in a very narrow spectral region near the sodium D-line8. The light is scattered by sodium vapour at low density and the scattered light recorded by a photoelectric spectrometer. The latter resolves the two lines and allows the effect of stray light to be eliminated. With sunlight the radiation detected is at the bottom of the Fraunhofer lines and the residual intensity there may be measured. It is found that this intensity decreases slightly (relative to the continuum) as the sun approaches the horizon. This effect is attributed to atmospheric sodium; the amount found by this method agrees well with that deduced from twilight measurements made the same day.
author2	Currie, B. W.
author_facet	Currie, B. W. Scrimger, Joseph Arnold
author	Scrimger, Joseph Arnold
spellingShingle	Scrimger, Joseph Arnold Absorption of sunlight by atmospheric sodium
author_sort	Scrimger, Joseph Arnold
title	Absorption of sunlight by atmospheric sodium
title_short	Absorption of sunlight by atmospheric sodium
title_full	Absorption of sunlight by atmospheric sodium
title_fullStr	Absorption of sunlight by atmospheric sodium
title_full_unstemmed	Absorption of sunlight by atmospheric sodium
title_sort	absorption of sunlight by atmospheric sodium
publisher	University of Saskatchewan
publishDate	2011
url	http://library.usask.ca/theses/available/etd-10312011-130541/
work_keys_str_mv	AT scrimgerjosepharnold absorptionofsunlightbyatmosphericsodium
_version_	1716532893811998720

Absorption of sunlight by atmospheric sodium

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