Jackson, I. W. (Isaac Wilber), 1804-1877 · Schenectady : L.A. Young · leaf 217
Z cos r Denoting then by p any number of the naturalseries, we havej 4e cos r? = j—; and hence I = \y. I. = \y I sec r. cos r From this equation it appears, 1°. That the thicknesses at which the successiverings are formed, are as the numbers of the naturalseries. ^ 2°. That for different kinds of…
Optics
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