07 Mar, 2013
PRESENTATION: A radiometer has four vanes, silvered on one side and blackened on the other. The vanes are mounted on a low friction pivot inside a glass sphere with a partial vacuum of the order of 10e-2 mm of Hg. The change in linear moment is greater on the warm black surfaces as they absorb infrared radiation. Molecules gain energy on them and so rotation is produced towards the silver surfaces.
- Radiometer Mystery, Wojciech Dindorf, Phys. Teach. 40, 504 (2002)
- The Radiometer and How It Does Not Work, Arthur E. Woodruff, Phys. Teach. 6, 358 (1968)
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