Atomic Pinball Clock

 

This clock reads time data from WWVB Atomic Clock data broadcast over
radio waves. It then uses the upright display from an old pinball
machine to show the time.

Gene Hoglan ; The Atomic Clock

Strontium Atomic Clock
The world's most accurate atomic clock based on neutral atoms has been demonstrated by physicists at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder. The JILA strontium clock would neither gain nor lose a second in more than 200 million years. Bathed in red laser light at exactly the right frequency, strontium atoms "tick" 430 trillion times a second. Ultrahigh accuracy atomic clocks are critical for GPS navigation, space travel, high-speed computer networking, advanced chemistry, and many other applications. For more information see: http://www.nist.gov/public_affairs/clock/clock.html .