How do we establish a standard time interval in physics and the standard unit of time, the second? By the natural frequencies in an atom of the element cesium. From the mechanical spin of a standard metal cylinder From the duration of the year, the orbital period of Earth around the Sun From the rotation rate of the Earth on its axis

Answered: How do we establish a standard time…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter9: Relativity

Section: Chapter Questions

Problem 7P

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How do we establish a standard time interval in physics and the standard unit of time, the second?

		By the natural frequencies in an atom of the element cesium.
		From the mechanical spin of a standard metal cylinder
		From the duration of the year, the orbital period of Earth around the Sun
		From the rotation rate of the Earth on its axis

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Step 1

Option (1) is correct.

Explanation- We know that the atomic clocks are world's most accurate clocks. Hence a standard time interval and the standard unit of time, the second in physics to established using the natural frequencies in an atom of the element cesium.

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