Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 93
where 70 STARGAZING: PAST AND PRESENT. [book II. a 5 is the object so near the eye that, if it were not forthe lens l, its image would not come to a focus on theretina at all. The effect of the lens is to make the raysproceeding in a cone from a and h less divergent, sothat after passing through… … Fig. 35.—1. Diagram showing path of rays when viewing an object at an easydistance. 2. Object brought close to eye when the lens L is required toassist the eye-lens to observe the image when it is magnified. A convex lens then has the power of magnifying objectswhen brought near the eye, and its…
Astronomy · Telescopes
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