Complete the following statement: Today, the standard unit of time is defined in terms of
A)the electromagnetic waves emitted by cesium atoms.
B)the motion of the moon around the earth.
C)the motion of a precision pendulum.
D)the average solar day.
E)the speed of light.

Question

Quizplus · Accepted Answer

The standard unit of time is defined in terms of the electromagnetic waves emitted by cesium atoms. This is known as the atomic clock, and it is used as the basis for the International System of Units (SI) second.

Complete the Following Statement: Today, the Standard Unit of Time