Unit of Time

Time is an interesting concept and we all are very familiar with it and know about it. However, the measurement of time requires some specification of units. There are several different units of time and they are used accordingly, mostly based on certain circumstances.

Table of Contents:

What Is Time?

Time is defined as the continued progress of existence in the past, present and future. Using the unit of time one can measure the existence of events. Following are the most commonly used units of time:

  • Second
  • Minute
  • Hour

SI Unit of Time

The SI unit of time is the second, which has been further accurately defined as “the time interval equal to 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom (13th CGPM, 1967).” In any case, the unit second is often represented as s or sec.

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