Spectroscope, 1882. A spectroscope of the type used by Gustave Robert Kirchhoff (1824-1887) and Robert Wilhelm Bunsen (1811-1899) in studying the emission spectra of heated chemical elements. From Physics in Pictures by Theodore Eckardt. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Taille de l’image : | 3302 px × 5287 px |
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Property Release : | Non requis |
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