Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 115
a fishcomes close to the surface. Every dense transparent substance has this ability to yieldimages by total reflection, each substance having a critical angleof its own; we have just seen that for water this angle is 480 35.Glass is made in many varieties, each with a special critical angle,never… … AB water level. F, G, H, L are refracted to C, D, E, B.I is totally reflected to I. employed in opera glasses, in hand telescopes, in reflectors forlight-houses, and in the Holophane globes we are about toexamine. The efficiency of these prisms may be as much as 92per cent., whereas that of the…
Inventions · Inventors
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