Second
Appearance
Second (SI symbol: s), jske kabhi abhi sec. se abbreviate karaa jaawe hae, International System of Units (SI) base unit ke time ke measuement hae.
Aur dekho
[badlo | source ke badlo]- Atomic clock
- Becquerel
- Hertz
- International Atomic Time
- International System of Units
- Leap second
- Magneto-optical trap
- Time standard
References
[badlo | source ke badlo]External links
[badlo | source ke badlo]![](http://178.128.105.246/content-http-upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
Wikimedia Commons me Second ke baare me kuchh media hae.
- National Physical Laboratory: Trapped ion optical frequency standards
- High-accuracy strontium ion optical clock; National Physical Laboratory (2005)
- National Research Council of Canada: Optical frequency standard based on a single trapped ion Archived 2008-03-14 at the Wayback Machine
- NIST: Definition of the second; notice the cesium atom must be in its ground state at 0 K
- Official BIPM definition of the second
- Seconds and leap seconds by the USNO Archived 1996-11-26 at the Wayback Machine
- The leap second: its history and possible future
- What is a Cesium atom clock? Archived 2009-02-20 at the Wayback Machine