File:Nplcaesium.gif
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Nplcaesium.gif (267 × 210 pixels, file size: 58 KB, MIME type: image/gif)
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Summary
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| Description |
English: The world's first caesium atomic clock, developed at the UK National Physical Laboratory in 1955 by Louis Essen (right) and J. V. L. Parry (left). |
| Date | |
| Source | http://tycho.usno.navy.mil/gif/nplcaesium.gif |
| Author | US Naval Observatory |
| Other versions |
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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, it is in the public domain in the United States.
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| 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 | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:41, 20 December 2008 | | 267 × 210 (58 KB) | Coenen (talk | contribs) | {{Information |Description={{en|1=world's first atomic clock, developed by Louis Essen in 1955}} |Source=http://tycho.usno.navy.mil/gif/nplcaesium.gif |Author=US Naval Observatory |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> |
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