The Nature of Light

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The Nature of Light
Chapter 22
Preview
CRCT Preparation
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CRCT Preparation
Chapter 22
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
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CRCT Preparation
Chapter 22
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
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CRCT Preparation
Chapter 22
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
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CRCT Preparation
Chapter 22
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
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CRCT Preparation
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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CRCT Preparation
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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CRCT Preparation
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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CRCT Preparation
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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CRCT Preparation
Chapter 22
5. Which of the following helps to produce
rainbows in the sky? A diffraction B
interference C absorption D refraction
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CRCT Preparation
Chapter 22
5. Which of the following helps to produce
rainbows in the sky? A diffraction B
interference C absorption D refraction
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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.
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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.
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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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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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CRCT Preparation
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.
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CRCT Preparation
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.
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CRCT Preparation
Chapter 22
9. How is sound sent from a radio station in
Atlanta to a radio in Macon?
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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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CRCT Preparation
Chapter 22
10. How do X rays form an image of a broken
bone, such as a broken arm bone?
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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.