5DQ - University Physics with Modern Physics

Question

What physical phenomena (other than a pendulum or cesium clock) could you use to define a time standard?

Step-by-Step Solution

Answer

A physical phenomenon used to define time standard is the earth's Rotation.

Step 1: Time standard

Time standard refers to the specifications of measuring the time.

Step 2: Rotation of theEarth

Any phenomenon that repeats itself on a regular interval is possible to define time standard, so the Rotation of the earth is 24 hours and is constant so that we can sayexcept for pendulum and clock,the rotation of the earth is also the physical phenomena.