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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Reflection
of light waves from a smooth surface is ____. a. | diffuse reflection | c. | irregular reflection | b. | mirror
reflection | d. | regular
reflection | | | | |
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2.
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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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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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A gas
commonly used in lighting devices is ____. a. | helium | c. | hydrogen | b. | neon | d. | green | | | | |
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5.
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Light of one
wavelength that travels with its crests and troughs aligned is ____. a. | coherent
light | c. | florescent
light | b. | polarized light | d. | diffused light | | | | |
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6.
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Optical
fibers rely on ____ for their efficiency. a. | coherent light | c. | diffuse reflection | b. | opaqueness | d. | total internal
reflection | | | | |
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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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