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 651
Fio. 580.—Plan of the spectrometer. so that it can be rotated about the axis O of the spectrometer. Its position with respect to the scale S can be observed by means ofthe vernier V. Expt. 142.—Determination of the angle of a prism by means of thespectrometer. Focus the cross-wires by drawing the… … (a) (b) Fia. 581.—Measurement of the miRle of a prism. object. Next turn it to face the collimator, the slit being illuminated by abuneen burner, in which some common salt is held on a piece of iron gauzeor asbestos board. Draw the slit in or out until its image in the eyepieceis tocusscd. The…
Physics
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