Measurement of Time
Measurement of Time: Overview
In this topic, we will study how to measure any time interval. It also explains the use of cesium in the atomic clock to measure the time. SI unit of time and the department responsible for the maintenance and improvement of physical standards in India are also discussed.
Important Questions on Measurement of Time
Unit of time (second) is defined in SI units in terms of:-

One second is defined as equal to

Atomic standard time is based on

What is the uncertainty in time realisation by the cesium atomic clocks?

At what temperature value they are measuring time units using caesium atoms?( in )

SI unit second define by how many cycles of the radiation corresponding to two energy levels of the ceasium?

What is the Internation system of unit of the time?

Which of the following is not a unit of time?

Which of the following is the most accurate device for measuring time?

Define a second in the context of an atomic clock.

Which of the following is the most accurate device for measuring time?


In earlier days, movement of the moon was used to calculate the time of the day.


