File:Fraunhofer spectroscope.JPG
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This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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Summary
| Description | Joseph von Fraunhofer demonstrating the spectroscope. On left Joseph von Utzschneider, on right Georg Friedrich von Reichenbach. Photogravure from a painting by Richard Wimmer. |
| Date | |
| Source | "Essays in astronomy" - D. Appleton & company, 1900 (LCCN 00004435) |
| Author | Richard Wimmer |
Licensing
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1930. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 02:37, 7 June 2022 | 1,685 × 1,325 (340 KB) | 0m9Ep | Brightness, color |
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