Chapter 22 by gjmpzlaezgx

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									              The Nature of Light
Chapter 22




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    CRCT Preparation




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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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 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




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 Chapter 22        CRCT Preparation



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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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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 Chapter 22         CRCT Preparation


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.

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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.


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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.


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5. Which of the following helps to produce rainbows in
the sky?
A diffraction
B interference
C absorption
D refraction




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5. Which of the following helps to produce rainbows in
the sky?
A diffraction
B interference
C absorption
D refraction




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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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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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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




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




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




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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.




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