File:USNO rubidium fountain.jpg
USNO_rubidium_fountain.jpg (250 × 282 pixels, file size: 20 KB, MIME type: image/jpeg)
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Summary
| Description |
English: Rubidium (Rb) fountain atomic clock at the U.S. Naval Observatory
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| Date | |
| Source | U.S. Naval Observatory |
| Author | U.S. Naval Observatory |
For description, see http://www.skyandtelescope.com/community/skyblog/newsblog/36234159.html
Licensing
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. |
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