Question

Suggest an instrument for measuring time period more accurately ​

Answer 1

Answer:

In the past, a common time measuring instrument was the sundial. Today, the usual measuring instruments for time are clocks and watches. For highly accurate measurement of time an atomic clock is used.

Answer 2

Cesium atomic clocks are the most accurate!

Time is measured using a mechanical, electric or atomic clock. However, cesium atomic clocks are the most accurate. An atomic clock's mechanism is based on the interaction of electromagnetic radiation with the excited states of certain atoms.