File:ReflectingTelescope 011.jpg
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Size of this preview: 800 × 526 pixels. Other resolutions: 320 × 210 pixels | 640 × 421 pixels | 1,024 × 673 pixels | 1,280 × 841 pixels | 2,560 × 1,683 pixels | 4,206 × 2,765 pixels.
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Summary
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| Description | 70-inch disk after an 8-inch core [resting on the surface of the disk] has been cut out of the center | |||
| Date | 9/1/1928 | |||
| Source | National Institute of Standards and Technology | |||
| Author | National Institute of Standards and Technology | |||
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:03, 10 March 2014 | | 4,206 × 2,765 (10.19 MB) | NISTResearchLibrary (talk | contribs) |
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