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The Inverse Square Law and Its Impact on Lighting

Description: The Inverse Square Law and Its Impact on Lighting
Number of Questions: 14
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Tags: photography photography lighting inverse square law
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What is the inverse square law?

  1. A law that states that the intensity of light decreases as the square of the distance from the source increases.

  2. A law that states that the intensity of light increases as the square of the distance from the source increases.

  3. A law that states that the intensity of light remains constant regardless of the distance from the source.

  4. A law that states that the intensity of light decreases as the distance from the source increases.

Show answer
Correct Option: A
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that if you double the distance between a light source and an object, the amount of light that reaches the object will be reduced by a factor of four.

How does the inverse square law affect the brightness of a light source?

  1. It makes the light source appear brighter as the distance from the object increases.

  2. It makes the light source appear dimmer as the distance from the object increases.

  3. It has no effect on the brightness of the light source.

  4. It makes the light source appear brighter as the distance from the object decreases.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the distance between a light source and an object increases, the amount of light that reaches the object will decrease, making the light source appear dimmer.

What is the relationship between the intensity of light and the distance from the source?

  1. The intensity of light is directly proportional to the distance from the source.

  2. The intensity of light is inversely proportional to the square of the distance from the source.

  3. The intensity of light is inversely proportional to the distance from the source.

  4. The intensity of light is directly proportional to the square of the distance from the source.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that the intensity of light is inversely proportional to the square of the distance from the source.

How does the inverse square law affect the amount of light that reaches an object?

  1. It increases the amount of light that reaches the object as the distance from the source increases.

  2. It decreases the amount of light that reaches the object as the distance from the source increases.

  3. It has no effect on the amount of light that reaches the object.

  4. It increases the amount of light that reaches the object as the distance from the source decreases.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the distance between a light source and an object increases, the amount of light that reaches the object will decrease.

What is the effect of the inverse square law on the brightness of a light source as the distance from the object increases?

  1. The light source appears brighter.

  2. The light source appears dimmer.

  3. The light source appears the same.

  4. The light source appears brighter and then dimmer.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the distance between a light source and an object increases, the amount of light that reaches the object will decrease, making the light source appear dimmer.

How does the inverse square law affect the amount of light that reaches a subject in a photograph?

  1. It increases the amount of light that reaches the subject as the distance from the camera increases.

  2. It decreases the amount of light that reaches the subject as the distance from the camera increases.

  3. It has no effect on the amount of light that reaches the subject.

  4. It increases the amount of light that reaches the subject as the distance from the camera decreases.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the distance between a light source and an object increases, the amount of light that reaches the object will decrease. In photography, this means that as the distance between the camera and the subject increases, the amount of light that reaches the subject will decrease, making the subject appear darker.

What is the relationship between the intensity of light and the area of a surface?

  1. The intensity of light is directly proportional to the area of the surface.

  2. The intensity of light is inversely proportional to the area of the surface.

  3. The intensity of light is inversely proportional to the square of the area of the surface.

  4. The intensity of light is directly proportional to the square of the area of the surface.

Show answer
Correct Option: C
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that the intensity of light is inversely proportional to the square of the area of the surface.

How does the inverse square law affect the amount of light that reaches a surface?

  1. It increases the amount of light that reaches the surface as the distance from the source increases.

  2. It decreases the amount of light that reaches the surface as the distance from the source increases.

  3. It has no effect on the amount of light that reaches the surface.

  4. It increases the amount of light that reaches the surface as the distance from the source decreases.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the distance between a light source and a surface increases, the amount of light that reaches the surface will decrease.

What is the relationship between the intensity of light and the angle of incidence?

  1. The intensity of light is directly proportional to the angle of incidence.

  2. The intensity of light is inversely proportional to the angle of incidence.

  3. The intensity of light is inversely proportional to the square of the angle of incidence.

  4. The intensity of light is directly proportional to the square of the angle of incidence.

Show answer
Correct Option:
Explanation:

The intensity of light is directly proportional to the cosine of the angle of incidence. This means that as the angle of incidence increases, the amount of light that reaches a surface will decrease.

How does the inverse square law affect the amount of light that reaches a surface as the angle of incidence increases?

  1. It increases the amount of light that reaches the surface.

  2. It decreases the amount of light that reaches the surface.

  3. It has no effect on the amount of light that reaches the surface.

  4. It increases the amount of light that reaches the surface and then decreases it.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the angle of incidence increases, the amount of light that reaches a surface will decrease.

What is the relationship between the intensity of light and the wavelength of light?

  1. The intensity of light is directly proportional to the wavelength of light.

  2. The intensity of light is inversely proportional to the wavelength of light.

  3. The intensity of light is inversely proportional to the square of the wavelength of light.

  4. The intensity of light is directly proportional to the square of the wavelength of light.

Show answer
Correct Option: C
Explanation:

The intensity of light is inversely proportional to the square of the wavelength of light. This means that as the wavelength of light increases, the amount of light that reaches a surface will decrease.

How does the inverse square law affect the amount of light that reaches a surface as the wavelength of light increases?

  1. It increases the amount of light that reaches the surface.

  2. It decreases the amount of light that reaches the surface.

  3. It has no effect on the amount of light that reaches the surface.

  4. It increases the amount of light that reaches the surface and then decreases it.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the wavelength of light increases, the amount of light that reaches a surface will decrease.

What is the relationship between the intensity of light and the medium through which it travels?

  1. The intensity of light is directly proportional to the density of the medium.

  2. The intensity of light is inversely proportional to the density of the medium.

  3. The intensity of light is inversely proportional to the square of the density of the medium.

  4. The intensity of light is directly proportional to the square of the density of the medium.

Show answer
Correct Option: B
Explanation:

The intensity of light is inversely proportional to the density of the medium. This means that as the density of the medium increases, the amount of light that reaches a surface will decrease.

How does the inverse square law affect the amount of light that reaches a surface as the density of the medium increases?

  1. It increases the amount of light that reaches the surface.

  2. It decreases the amount of light that reaches the surface.

  3. It has no effect on the amount of light that reaches the surface.

  4. It increases the amount of light that reaches the surface and then decreases it.

Show answer
Correct Option: B
Explanation:

The inverse square law states that the intensity of light decreases as the square of the distance from the source increases. This means that as the density of the medium increases, the amount of light that reaches a surface will decrease.

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