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 636
of the fieldof vision becomes very smallowing to the magnification,unless precautions are takento get as much light as possibleto pass through the objectiveand so contribute to the for-mation of the image. Withlenses as usually employed,only the central parts may beused (p. 587), since lenses are… … \ ■ / M; vO I a 612 LIGHT CHAP. the objective. It is plane on its under side A, and its upper surfaceB is spherical. The space between A and the microscope slide isoccupied with cedar-wood oil, which ha^ the same refractive index asglass, so that the object O may, for optical purposes, be…
Physics
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