Any phenomenon that repeates itself regularly at equal intervals of time can used to measure time.
The examples are:
(i) Rotation of earth—The time interval for one
complete rotation is called a day.
(ii) Oscillations of a pendulum.
Any phenomenon that repeates itself regularly at equal intervals of time can used to measure time.
The examples are:
(i) Rotation of earth—The time interval for one
complete rotation is called a day.
(ii) Oscillations of a pendulum.