File:Time & Frequency; Atomic Clocks (5881386915).jpg
Time_&_Frequency;_Atomic_Clocks_(5881386915).jpg (229 × 305 pixels, file size: 26 KB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
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| Description |
NIST physicist Jim Bergquist holds a portable keyboard used to set up the world's most accurate clock. The silver cylinder in the foreground is a magnetic shield that surrounds a cryogenic vacuum system, which in turn holds the heart of the clock, a single mercury ion (electrically charged atom). The ion is brought to rest by laser-cooling it to near absolute zero. The optical oscillations of the essentially motionless ion are used to produce the "ticks" or "heartbeat" of the world's most stable and accurate clock. Copyright Geoffrey Wheeler This image may be used for any NIST purpose. Correct photo credit must be provided. Other organizations may use this image without charge for editorial articles that mention NIST in accompanying text or a caption. Correct photo credit must be provided. "Stock art" use requires permission and may require payment to the photographer. To receive a high resolution version send an email with the image AV number (06PHY013) and title to inquiries@nist.gov. Disclaimer: Any mention of commercial products within NIST web pages is for information only; it does not imply recommendation or endorsement by NIST. Use of NIST Information: These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology (NIST). With the exception of material marked as copyrighted, information presented on these pages is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credits is requested. |
| Date | |
| Source | Time & Frequency; Atomic Clocks |
| Author | National Institute of Standards and Technology |
Licensing[edit]
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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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This image was originally posted to Flickr by National Institute of Standards and Technology at https://flickr.com/photos/63059536@N06/5881386915. It was reviewed on 7 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the United States Government Work. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:36, 7 September 2016 | | 229 × 305 (26 KB) | Vanished Account Byeznhpyxeuztibuo (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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