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 616
is CD ; andall other rays that leave A and emerge from the sphere, in a mannersimilar to CD, will travel after refraction as though they came from B.Thus the sphere is an aplanatic surface with respect to two_conjugatefeoints such as A and B. This fact is used in oil immersion micro-jscopes (p.… … v Fio. 541.—Refraction by a lens. L both positive to avoid confusion of signs, but the result is quitej general. A is the object, and refraction at the first surface of radius r,• would produce an image at A1; according to the relation \j±zl (1) u rx A is now the object with respect to the second…
Physics
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