The London encyclopaedia, or Universal dictionary of science, art, literature, and practical mechanics, comprisiong a popular view of the present state of knowledge . in which A is the radiating point from which therays a, b, c. &c., diverge, and F is tlie focus ofthe lens B. These rays, after passing throughthe lens, continue to diverge in the space C The focus of the suns parallel rays, whentransmitted through a double convex lens, isshown in the annexed figure. The parallel rays. a r ^ ^ ^?^ ^^^ obliquely on tne surfaceA D of a double convex lens, are refracted orbent inward in glass
The London encyclopaedia, or Universal dictionary of science, art, literature, and practical mechanics, comprisiong a popular view of the present state of knowledge . in which A is the radiating point from which therays a, b, c. &c., diverge, and F is tlie focus ofthe lens B. These rays, after passing throughthe lens, continue to diverge in the space C The focus of the suns parallel rays, whentransmitted through a double convex lens, isshown in the annexed figure. The parallel rays. a r ^ ^ ^?^ ^^^ obliquely on tne surfaceA D of a double convex lens, are refracted orbent inward in glassing through tlie lens ; and meet in a focus or point at C, which is the cen-tre of the lenss convexity, beyond which theydiverge to the contrary sides as a,b,c,d, & middle ray d, falling perpendicularly on tliesurface of the lens at D, suffers no refraction inpassing through it. 390. A convex glass magnifies the angle ofvision ; the reason is this. Without a lens, F G, 1>
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Keywords: ., boo, bookcentury1800, bookdecade1830, bookpublisherlondontteggson
