Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 545
had been invented by Wheatstone formeasuring the velocity of electricity. In the description of this apparatus, a knowledge of the principal pro-perties of mirrors and of lenses is presupposed. Fig. 478 represents thechief parts of Foucaults arrangement. The window shutter, K, of a darkchamber is… … Fig. 478 ^g• <79 wire, and then traverses an achromatic lens, L, with a long focus placedat a distance from the platinum wire less than double its focal length.The image of the platinum wire, more or less magnified, would thus beformed on the axis of the lens ; but the pencil of light, having…
Physics
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