Category:Definitions/Second of Time
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This category contains definitions related to Second of Time.
The second is the SI base unit of time, and also therefore of the MKS system.
It is also the base unit of time for the FPS and CGS systems.
The second is defined as:
- the duration of $9 \ 192 \ 631 \ 770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium $133$ atom at rest at $0 \ \mathrm K$.
Pages in category "Definitions/Second of Time"
The following 2 pages are in this category, out of 2 total.