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 637
ascentre, so that the rays are not bent on entering; but the surface Dis spherical with Ox and 02 as aplanatic points. On leaving D therays are not diverging too much to be made use of in the microscope,and they are all diverging from the point 02. Evidently more lightis made use of than if the… … Fig. 566. —Two lenses used as an astronomical telescope. change in purpose, viz. the viewing of distant objects. A lens, againknown as the objective, produces a real image of the object to beexamined, and this image is observed by means of an eyepiece. In Fig. 566 O represents the objective which…
Physics
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