Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 210
PRECEDING THEORY TO THE DEVI-ATION OF LIGHT BY REFRACTION THROUGH THE VARI-OUS KINDS OF SPHERICAL LENSES. § 42. A lens has been defined to be, any medium Application ofbounded by curved surfaces, used for the purpose of*^^™*deviating light by refraction; the surfaces are generally various… … Geometricalrepresentationsof the sphericallenses. 202 NATURAL PHILOSOPHY. Double convexlens; Plano-convex;
Mechanics · Acoustics · Optics
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