Elementary treatise on physics, experimental and applied, for the use of colleges and schools (1898)
Ganot, A. (Adolphe), 1804-1887 · London, Longmans, Green · leaf 609
ed at a'b', and will be much smaller, and nearer the eye. On the other hand, if the object is moved farther from the lens, the angle between the secondary axes is diminished, and their intersection with the prolongation of the re¬ fracted rays taking place beyond A'B', the image is formed farther… … Fig. 573 the spherical aberration of these rays being nearly inappreciable. Spherical aberration may be still further corrected by using two plano-convex lenses, instead of one very con¬ vergent lens. When this is done, the plane face of each lens is turned towards the object (fig. 573). Although…
Physics
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