Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 546
, that the small deviation may be neglected whichrays experience in traversing a medium with parallel faces (fig. 508). So long as the secondary axes only make a small angle with the principalaxis, all that has hitherto been said about the principal axis is applicable tothem ; that is, that rays… … 528 On Light. [555- focal distance, the focus thus formed will be conjugate or virtual. Thisprinciple is the basis of what follows as to the formation of images. 556. Formation of imag-es In double convex lenses.—In lenses, as wellas in mirrors, the image of an object is the collection of the foci…
Physics
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