Second

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 

 Atomic clock
 Becquerel
 Hertz
 International Atomic Time
 International System of Units
 Leap second
 Magneto-optical trap
 Time standard

 References 

 External links 

 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 
 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 
 The leap second: its history and possible future
 What is a Cesium atom clock? 

Category:Centimetre gram second system of units
Category:Orders of magnitude (time)
Category:SI base units
Category:Naap taul
vibhag:Samay