A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 613
regards sign given on p. 567,we see that the focal length of aconverging lens is negative, whilethat of a diverging lens is positive. Classification of lenses.— Names are sometimes adopted Fig. 536.-Refraction by diverging lens. which are descriptive of the shapes of the lenses. The first three… … Double Piano- Concavo-Convex Convex Convex DoubleConcave Piano-Concave Convexo-Concave Converging Lenses Diverging Lenses Fig. 537.—Classification of lenses. Refraction at single spherical surface.—In order to obtain the lensformula, the production of an image by a single refracting surfacewill be…
Physics
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