Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 144
the method of reflection. A small concave mirror(Fig. 65) is supported by the rod of the needle, and is movablewith it. A vertical slit of lia^ht and a scale divided into milli- 120 ELECTROSTATIC MEASUREMENT [84- metres (Fig. 67) are placed in the veitieal plane passing throughthe centre of… … 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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