Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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What
wavelength of light is reflected from a red shirt? a. | red | c. | white | b. | all but red | d. | green | | | | |
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2.
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An image of
a distant object produced by the refraction of light through air layers of different densities is
____. a. | a
mirage | c. | coherent | b. | a ghost image | d. | incoherent | | | | |
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3.
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Fluorescent
lightbulbs ____ than incandescent lights. a. | are less expensive | c. | produce more heat | b. | do not last
longer | d. | use less
energy | | | | |
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4.
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The primary
light colors are ____. a. | magenta, cyan, and yellow | c. | white and black | b. | red, blue, and
green | d. | yellow, blue, and
green | | | | |
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5.
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A gas
commonly used in lighting devices is ____. a. | helium | c. | hydrogen | b. | neon | d. | green | | | | |
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6.
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Waves
vibrate in only one direction in ____. a. | incoherent light | c. | fluorescent light | b. | polarized
light | d. | diffused
light | | | | |
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7.
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Lasers can
be a part of all the following EXCEPT ____. a. | optical scanners | c. | wall clock | b. | CD players | d. | surgical equipment | | | | |
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