File:PSM V09 D291 Effects of temperature on light.jpg
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DescriptionPSM V09 D291 Effects of temperature on light.jpg |
English: Two radiometers built by British physicist William Crookes to try to demonstrate the mechanical pressure exerted by light. From William Crookes (1876) "The Mechanical Action of Light", Popular Science Monthly. In the device on the left, a card that is reflective (white) on one side and absorbent (black) on the other is suspended from a fine glass torsion fiber in a vacuum. Light striking the white side is reflected back, imparting twice the force to the card as light striking the other side which is absorbed. So the greater force on the right side was supposed to cause card to turn slightly, twisting the fiber. |
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Source | Popular Science Monthly Volume 9 | |||||
Author | Unknown authorUnknown author | |||||
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current | 19:50, 14 July 2010 | 1,004 × 1,770 (64 KB) | Ineuw (talk | contribs) | {{Information |Description = Effects of temperature on light |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_9.djvu/291 |Date = 1876 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|en|Wikiso |
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