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 656
m, and measures the dispersion produced. If the average■i (/< + /<•) l»L taken as ll, we have for the deviation of this mean ray, D = (/x-l)A, and Dl)-Dr = fl~*{ix-\)A _/q-/*rp XLVin ACHROMATIC PRISM 631 The quantity ——— is called the dispersive power (oj) of the /x-1 material of which the… … Red— Blue Fig. 586.—Achromatic combination of prisms. two parts made of different kinds of glass. If the prism C (Fig. 586)consist of crown glass and have an angle of 60°, and the prism F offlint glass, with angle 29° 17, the dispersion produced by eachis found to be the same, since the dispersive…
Physics
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