hat
Revèy la atomik oswa tan atomik se yon echèl tan ki baze sou definisyon an nan dezyèm lan lè l sèvi avèk revèy atomik yo mete estanda nan tan itilize nan tout mond lan. Dezyèm lan te defini nan 1967 nan 13 konferans lan Jeneral sou Weights ak Mezi. Depi li pran 3 600 segonn pandan yon ti tan.
eng
The atomic clock or atomic time is a time scale based on the definition of the second using atomic clocks to set the time standard used throughout the world. The second was defined in 1967 at the 13th General Conference on Weights and Measures. Since it takes 3 600 seconds for one hour.