This image is copyrighted by the photographer.
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 and title
to inquiries@nist.gov.
72 DPI Image ©
150 DPI Image ©
300 DPI Image ©
|
| Title: |
Time & Frequency; Atomic Clocks; NIST F1; Jefferts; Donley; Heavner |
| Description: |
NIST researchers (left to right) Steven Jefferts, Elizabeth Donley, and Tom Heavner with NIST F1. The clock uses a fountain-like movement of cesium atoms to determine the length of the second so accurately that--if it were to run continuously--it would neither lose nor gain one second in 80 million years.
Learn more about how the clock works and view an animation of the clock in action.
*PHY, clock, cesium standard, timekeeping, second, SI, Boulder
See also http://www.nist.gov/public_affairs/techbeat/tb2005_0923.htm#clock.
|
| Subjects (names): |
Donley, Elizabeth
Heavner, Tom
Jefferts, Steven
|
| Topics/Categories: |
Metrology, Basic Units--Time
Time & Frequency--Atomic Clocks
|
| Type: |
Photo/Color |
| Source: |
National Institute of Standards and Technology |
Credit Line as it should
appear in print: |
Copyright 05 Geoffrey Wheeler Photography |
| AV Number: |
05PHY015 |
| Date Created: |
September 19, 2005 |
| Date Entered: |
9/22/2005 |
