Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 226
Course of Light through a Prism. The facets being at slightly different angles with theplane face of the glass, the rays are refracted differently ateach facet, thus producing as many images as there arefacets. One man seen through this instrument appears likean assemblage. A coin viewed through it… … ^c:m.\ y Polyi^irism. many times as there are facets, and a grate fire appears likethe conflagration of a city. This toy illustrates in a crude way the principle of theconvex lens. The several divisions of the prism are able toso refract a beam of light as to render it convergent, that isto say,…
Physics · Lantern projection · Electric apparatus and appliances
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