Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

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

What makes stars shine?

Why is the sun the only star that can be seen during the daytime?

A “shooting star” is usually a grain of sand from outer space that burns up and gives off light as it enters the atmosphere. What exactly causes this burning?

Answer 2

Question

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

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

Question

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

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

Question

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

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

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

Answer 6

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.

Answer 7

Chapter 17, Problem 1CC

To determine

Which out of the following would appear brighter — a handheld flash light at a distance of 10 cm (centimeter) or a spotlight on a lighthouse at a distance of 10 km (kilometer).

Answer 8

Expert Solution & Answer

Answer to Problem 1CC

Solution:

A handheld flashlight at a lesser distance would appear brighter than a distant spotlight atop a watchtower.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Introduction:

The amount of light an object emits depends on its size; the larger the object, the more light it emits. The brightness of the light emitted also depends on the distance from the observer. The stars, whether larger in size, equivalent to or much smaller than the Sun, appear less bright. This is because they are very far away from our planet.

Explanation:

The brightness of a small flashlight, which is much smaller than a spotlight atop a watchtower, is more. Although the intensity of the emitted light is more of than that of the spotlight, to a sailor or an observer, it will appear less bright at a distance of 10 km.

The small flashlight appears bright because it is just 10 cm away from the observer. Thus, along with the size of the light-emitting object, its brightness depends on its distance from the observer.

Conclusion:

Therefore, the small flashlight which is at a distance of just 10 cm from the observer will appear brighter than the spotlight atop a watch tower at a distance of 10 km from the observer in the open sea.