Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 Internet speed test! ×

Submission + - Leap second on June 30th (cnet.com)

knorthern knight writes: The second used to be defined as 1/86,400 th of a 24-hour day. But ocean tides, pounding against shorelines, slow down earth's rotation, so that a day gets 1.4 milliseconds longer each century. This seems small, but it would affect scientific constants (speed of light, etc). Since 1967, the International System of Units (SI) has defined the second as the duration of 9192631770 cycles of radiation corresponding to the transition between two energy levels of the caesium-133 atom. http://en.wikipedia.org/wiki/Atomic_clock#Mechanism Every few years, a "leap second" is added as necessary, either on June 30th or December 31st. Enjoy that extra second of sleep.

Slashdot Top Deals

I think there's a world market for about five computers. -- attr. Thomas J. Watson (Chairman of the Board, IBM), 1943

Working...