"Neue Modifikation des Lichtes durch gegenseitige Einwirkung und Beugung der Strahlen, und Gesetze derselben" in Denkschriften der Königlichen Akademie der Wissenschaften zu München für die Jahre 1821 und 1822, Vol. VIII, pp. 1-76
by FRAUNHOFER, Joseph
[For the Fraunhofer article]: two engraved plates (two double-page & one folding) & four lithographed plates (one folding). [12 plates for the entire volume]. Large thick 4to, orig. orange boards, printed paper label on spine, uncut. [Munich: 1821]. The entire journal volume, with the first appearance of Fraunhofer's paper "Neue Modifikation des Lichtes…," the first quantitative study of diffraction phenomena. "In 1821 and 1823, shortly after Fresnel's studies of interference phenomena had received general attention, Fraunhofer published two papers in which he observed and analyzed certain diffraction phenomena and interpreted them in terms of a wave theory of light. In the 1821 paper he discussed his examination of the spectra resulting from light diffracted through a single narrow slit and quantitatively related the width of the slit to the angles of dispersion of the different orders of spectra. Extending his observations to diffraction resulting from a large number of slits, he constructed a grating with 260 parallel wires… "Although David Rittenhouse and Thomas Young had previously noted some effects of crude diffraction gratings, Fraunhofer made the first quantitative study of the phenomena. The presence of the solar dark lines enabled him to note that the dispersion of the spectra was greater with his grating than with his prism. Hence, he examined the relationship between dispersion and the separation of wires in the grating. Utilizing the dark lines as bench marks in the spectrum for his dispersion determinations, he concluded that the dispersion was inversely related to the distance between successive slits in the grating. From the same study Fraunhofer was able to determine the wavelengths of specific colors of light."-D.S.B., V, p. 143. A very fine and fresh copy, seemingly printed on thick paper, and in as-new condition. From the Wittelsbach library of the dukes and kings of Bavaria. (Inventory #: 5539)
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