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| Title: |
Metrology, Basic Units; Electrical; Quantum Hall Effect; Elmquist |
| Description: |
Ultraprecise electrical measurements require extremely stable temperature, humidity, and vibration control. In this photo, NIST physicist Rand Elmquist fills a cryogenic chamber with liquid helium in preparation for measuring the international standard for electrical resistance--the quantum Hall effect. U.S. laboratories and manufacturers use NIST electrical standards and calibrations for all kinds of measurements from home electricity usage to electrocardiograms to gene-mapping.
*EEEL, ohm, electrical resistance, fundamental metrology
See also http://www.nist.gov/public_affairs/amlbrochure.htm.
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| Subjects (names): |
Elmquist, Rand
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| Topics/Categories: |
Facilities/Places--Advanced Measurement Lab
Metrology, Basic Units--Electrical
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| Type: |
Photo/Color |
| Source: |
National Institute of Standards and Technology |
Credit Line as it should
appear in print: |
Copyright Robert Rathe |
| AV Number: |
04EEEL001 |
| Date Created: |
June 21, 2004 |
| Date Entered: |
11/3/2004 |
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