Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 549
aplanatic. -559] Fornmlce relating to Lenses. 531 559. Formulae relating: to lenses.—In all lenses the relations betweenthe distances of the image and object, the radii of curvature, and the refrac-tive index may be expressed by a formula. In the case of a double convexlens, let P be a luminous… … points of incidence and emergence, and I PA be put equal to a, EPA = /3ECA = y, ICA = S, NIP = z, EIO = r, IEO = z, NEP = r. Because the angle i is the exterior angle of the triangle PIC, and theangle r the exterior angle of the triangle CEP, therefore z = a-t-S, andr = 7 + /3, whence z+r = a-i-8 +…
Physics
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