Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 217
measuredby the power of the lens. Hence, to construct the focus,draw the extreme rayFD, and from the pointZ>, the line D H, mak-ing with the incidentr&yFD, produced, theangle IID K, equal tothe power of the lens;D H will be the de-viated ray, and the point F\ where it meets the axis, will be… … is 48. Suppose the conjugate foci to be in motion, Conjugate focisupposed in motion; and denote any two consecutive values of / by x and a?, ELEMENTS OF OPTICS. 209 and the corresponding values of f by y and y\ then Notation andEquation (33), eqaations; 1 1 + ■> y Fu v / 777 I } 5 y Fu x…
Mechanics · Acoustics · Optics
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