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The Amazing Atomic Clock

What are atomic clocks? And why do we need them?
Publish Date: Topic: Physics + MathPhysics & MathNova
By Anna Rothschild

Dr. Steve Jefferts of the National Institute of Standards and Technology in Boulder, Colorado is an expert on how we measure time. In fact, he co-developed one of the world's most accurate atomic clocks. But why do we need such accuracy? Learn why atomic clocks are so important in our everyday lives.

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Major funding for "The Fabric of the Cosmos" is provided by the National Science Foundation, and the Alfred P. Sloan Foundation.

This material is based upon work supported by the National Science Foundation under Grant No. 0714645. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Additional funding for this program is provided by the Arthur Vining Davis Foundations, and by the U.S. Department of Energy's Office of Science.

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers.