The Atomic Secrets of Accurate Time Keeping

  • Playlist
  • Download
  • Embed
    <iframe src="" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Clocks measure time. But have you ever wondered how they do it? For this week's Science Out Of The Box, the answer can be found at the U.S. Naval Observatory's master clock facility. That's where the Navy fires a microwave beam at an atom to keep time.



Please keep your community civil. All comments must follow the Community rules and terms of use, and will be moderated prior to posting. NPR reserves the right to use the comments we receive, in whole or in part, and to use the commenter's name and location, in any medium. See also the Terms of Use, Privacy Policy and Community FAQ.

NPR thanks our sponsors

Become an NPR sponsor

Support comes from