Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 359
lens I forms an image L of the object iy,and then the lens V forms of the image Lan image L\ which is seen by the eyeplaced at E. The dotted lines passingfrom the ends of L indicate the courserays would take if L were a luminousbody. The effect on the eye in such caseis the same as if L were an… … Fig. 223. 575-576] APPLICATIONS OF BEFEACTION 345 575. The Telescope.—The purpose of a telescope is tocause distant objects to appear brighter and enlarged, sothat details may become visible. Increased brightness issecured by using a large objective lens; more rays oflight will strike this lens…
Physics
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-357-41.webp)
