CBSE Class 11-science Answered
Define the fundamental unit of time.
Asked by Topperlearning User | 16 Apr, 2014, 01:46: PM
Expert Answer
Second is the fundamental unit of time and is defined as the duration of 9,192,631,770 vibrations corresponding to the transition between two hyperfine levels of caesium -133 atom in the ground state.
Answered by | 16 Apr, 2014, 03:46: PM
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