The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 1, Problem 1CA

The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

The shear leg derrick is used to haul the 200-kg net of fish onto the dock as shown in. Assume the force in each leg acts along its axis. 5.6 m. 4 m- B Part A Determine the compressive force along leg AB. Express your answer to three significant figures and include the appropriate units. FAB = Value Submit Request Answer Part B Units ? Determine the compressive force along leg CB. Express your answer to three significant figures and include the appropriate units. FCB= Value Submit Request Answer Part C ? Units Determine the tension in the winch cable DB. Express your answer with the appropriate units. 2m

Part A (Figure 1) shows a bucket suspended from a cable by means of a small pulley at C. If the bucket and its contents have a mass of 10 kg, determine the location of the pulley for equilibrium. The cable is 6 m long. Express your answer to three significant figures and include the appropriate units. Figure 4 m B НА x = Value Submit Request Answer Provide Feedback < 1 of 1 T 1 m Units ?

The particle in is in equilibrium and F4 = 165 lb. Part A Determine the magnitude of F1. Express your answer in pounds to three significant figures. ΑΣΦ tvec F₁ = Submit Request Answer Part B Determine the magnitude of F2. Express your answer in pounds to three significant figures. ΑΣΦ It vec F2 = Submit Request Answer Part C Determine the magnitude of F3. Express your answer in pounds to three significant figures. ? ? lb lb F₂ 225 lb 135° 45° 30° -60°-

Answer 2

Textbook Question

Chapter 1, Problem 1CA

The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 1, Problem 1CA

The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 1, Problem 1CA

The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Answer 8

Expert Solution & Answer

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

The reason clocks based on the daily rotation has been replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium.

Answer 12

Answer to Problem 1CA

The time period of the earth’s rotation is not fixed and to have a proper clock, it requires giving error free time period which is not possible. Hence, it is replaced by the oscillation period of light waves emitted by atoms like cesium and rubidium. The oscillation period of light waves emitted by atoms is fixed. Hence, the clock will give error free time.

Answer 13

Explanation of Solution

Introduction:

The earth’s rotation period is four minutes less than what we call a day. Due to this, the Sun’s position in the sky at noon is roughly fixed, but the stars slowly drift apart. So, the stars which are overhead today will slowly move in the sky until they will be overhead at noon 6 months apart.

If instead, a day was defined to be the time taken for earth to rotate, then according to above stated reason, the sun will be overhead on some day at midnight. The time period for oscillation of light waves emitted by the atoms of cesium and rubidium is always fixed. Hence, they will always give error free time period forever.

Conclusion:

The time given by the earth’s rotation won’t be same everyday as the earth’s rotation speed is not fixed. Hence, the clocks based on it will give wrong time. Hence, we use clocks based on the oscillations of light waves emitted by atoms like cesium and rubidium.

Answer 14

Ch. 1 - The original “clock” used to define the length of...Ch. 1 - What is a leap second, and why w it introduced...Ch. 1 - To what extent was Aristotle’s model of falling...Ch. 1 - Describe two major discoveries or contributions...Ch. 1 - Consider Concept Map 1,1, which provides an...Ch. 1 - Prob. 2MIO Ch. 1 - (Indicates a review question, which means it...Ch. 1 - (Indicates a review question, which means it...Ch. 1 - (Indicates a review question, which means it...Ch. 1 - (Indicates a review question, which means it...

The original “clock” used to define the length of the second was the daily rotation of Earth about its axis. Why has this clock been replaced by one based on the oscillation period of light waves emitted by atoms like cesium and rubidium?

Concept explainers

Videos

Answer to Problem 1CA

Explanation of Solution

Want to see more full solutions like this?

Chapter 1 Solutions