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The Nature of Light

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Chapter 22

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Chapter 22 CRCT Preparation

1. While performing an experiment on the colors of light at the University of West Georgia, Pablo mixed three colors of light to form the image shown. What color would Pablo see at point A?

A yellow

B magenta

C white

D black



1. While performing an experiment on the colors of light at the University of West Georgia, Pablo mixed three colors of light to form the image shown. What color would Pablo see at point A?

A yellow

B magenta

C white

D black



2. What color would Pablo find at point A if pigments were used instead of colors of light?

A yellow

B magenta

C white

D black



2. What color would Pablo find at point A if pigments were used instead of colors of light?

A yellow

B magenta

C white

D black


Chapter 22

3. Which of these conclusions accurately describes the difference between mixing colors of light and mixing colors of pigment?

A Mixing colors of light involves color addition, while mixing pigments involves color subtraction.

B There are secondary pigments, but there are not secondary colors of light.

C Different colors of light always combine to form black light, while different colors of pigment always combine to form white pigment.

D Pigments cannot be mixed, while colors of light can.

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3. Which of these conclusions accurately describes the difference between mixing colors of light and mixing colors of pigment?

A Mixing colors of light involves color addition, while mixing pigments involves color subtraction.

B There are secondary pigments, but there are not secondary colors of light.

C Different colors of light always combine to form black light, while different colors of pigment always combine to form white pigment.

D Pigments cannot be mixed, while colors of light can.


Chapter 22

4. Ultraviolet light has a higher frequency than infrared light has. Which statement about visible light is true?

A Blue light has a longer wavelength than orange light has.

B Green light has a higher frequency than violet light has.

C Yellow light has a shorter wavelength than blue light has.

D Red light has a lower frequency than green light has.

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4. Ultraviolet light has a higher frequency than infrared light has. Which statement about visible light is true?

A Blue light has a longer wavelength than orange light has.

B Green light has a higher frequency than violet light has.

C Yellow light has a shorter wavelength than blue light has.

D Red light has a lower frequency than green light has.



5. Which of the following helps to produce rainbows in the sky?

A diffraction

B interference

C absorption

D refraction



5. Which of the following helps to produce rainbows in the sky?

A diffraction

B interference

C absorption

D refraction


Chapter 22

6. Why is the light from the flashlight brighter at point A than it is at point B?

A The flashlight is in a vacuum.

B Light does not travel very fast in air.

C The light is absorbed and scattered by air particles.

D Destructive interference makes the light appear dimmer.

CRCT Preparation


Chapter 22

6. Why is the light from the flashlight brighter at point A than it is at point B?

A The flashlight is in a vacuum.

B Light does not travel very fast in air.

C The light is absorbed and scattered by air particles.

D Destructive interference makes the light appear dimmer.

CRCT Preparation


Chapter 22

7. Which of the following produces a mirror image?

A illumination

B regular reflection

C scattering

D absorption

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7. Which of the following produces a mirror image?

A illumination

B regular reflection

C scattering

D absorption


Chapter 22

8. Students at the Medical College of Georgia in Augusta are studying to become X-ray technicians. What precautions must be taken when they use an X-ray machine to make images of patients’ broken bones?

A The patients should wear earplugs to protect their ears.

B The patients’ bodies should be protected with a lead-lined cover.

C The patients should wear helmets.

D The technician should wear safety goggles to protect his or her eyes.

CRCT Preparation



8. Students at the Medical College of Georgia in Augusta are studying to become X-ray technicians. What precautions must be taken when they use an X-ray machine to make images of patients’ broken bones?

A The patients should wear earplugs to protect their ears.

B The patients’ bodies should be protected with a lead-lined cover.

C The patients should wear helmets.

D The technician should wear safety goggles to protect his or her eyes.


Chapter 22

9. How is sound sent from a radio station in Atlanta to a radio in Macon?

CRCT Preparation


Chapter 22

9. Answer - Full-credit answers should include the following points:

• A radio station converts sound into electric current.

• The electric current produces radio waves that are sent out by antennae.

• A radio receives the radio waves and converts them into electric current.

• The electric current is converted into sound.

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Chapter 22

10. How do X rays form an image of a broken bone, such as a broken arm bone?

CRCT Preparation


Chapter 22

10. Answer - Full-credit answers should include the following points:

• X rays pass through the skin and muscle of the arm, but they are absorbed by the bones.

• Bright areas appear on the film where the rays are absorbed by the bones.

• X rays that are not absorbed strike a photographic plate behind the arm and produce dark areas.

CRCT Preparation

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