Austin, Louis W. (Louis Winslow), 1867-1932, Thwing, Charles B. (Charles Burton), 1860-1946, joint author · Boston, Allyn and Bacon · leaf 129
a large num-ber of equidistant parallel lines, with transparent spacesbetween them, is called a grating, and the spectrumobtained with it is called a diffraction spectrum. Fromthe fact that the deviation is proportional to the wave-length, it is often called the normal spectrum. Exercise 63.—To… … Fig. 61 (1) 8 = Exercise 00, and place the grat-ing upright upon the table (seeFig. 61) as nearly as possibleat right angles to the ray ofsodium light, by fixing the tele-scope upon the first bright bandto the right, and turning thetable slightly till the position ofminimum deviation is…
Physics
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