Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 143
ethod of reflection. A small concave mirror(Fig. 65) is supported by the rod of the needle, and is movablewith it. A vertical slit of light and a scale divided into milli- 120 ELECTEOSTATIC MEASUREMENT [84- metres (Fig. 67) are placed in the vertical plane passing throughthe centre of curvature and… … Fig. 67. image of the slit of light is produced in its real size on the scale.Instead of a narrow slit, a wider one may be used, in the middleof which an opaque wire is stretched vertically (Fig. 67). Theimage of the opening moves along the scale, and, as the region where the shadow of the…
Electricity · Magnetism
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