Sujet
Spectroscope, 1872
Légende
Spectroscope, 1872. Instrument of the type developed by Robert Bunsen (1811-1899) and Robert Kirchhoff (1824-1887) during the 1850s. Their work provided a precise tool to make use of Joseph von Fraunhofer's (1787-1826) observatians of dark lines in the solar spectrum (1814). The technique of chemical analysis through spectroscopy has become essential in both terrestrial and astronomical studies. From "Spectrum Analysis" by H. Schellen. (London, 1872).
Date
1872
Crédit
Photo12/Ann Ronan Picture Library
Notre référence
ARP07102_390006444
Licence
Droits gérés
Format disponible
25,2Mo (1,8Mo) / 30,0cm x 21,1cm / 3543 x 2490 (300dpi)