File:Photometer devised by Beer.jpg

Photometer_devised_by_Beer.jpg (475 × 240 pixels, file size: 26 KB, MIME type: image/jpeg)

Description
English: Light from the lamp at the right-hand side passes through an absorption cell, whereas the lamp at the left-hand side is a reference source. The photometer is adjusted so that the observed intensities from the two light sources are equal.
Date
Source

Original publication: 1855

Immediate source: http://www.canberra.edu.au/irps/archives/vol21no1/blbalaw.html
Author

August Beer

(Life time: 31 July 1825 – 18 November 1863)


Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Photometer_devised_by_Beer.jpg

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current22:18, 6 February 2013Thumbnail for version as of 22:18, 6 February 2013475 × 240 (26 KB)Nbenway{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Light from the lamp at the right-hand side passes through an absorption cell, whereas the lamp at the left-hand side is a reference source. The photometer is adjusted so that t...

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