Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following is a unit of length equal to one-billionth of a
meter?
a. | Gigameter | b. | Millimeter | c. | Billameter | d. | Nanometer |
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2.
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Light has all of the following characteristics EXCEPT:
a. | Light has color. | b. | Light has mass. | c. | Light can travel 7.5
times around Earth in one second. | d. | Light travels in straight
lines. |
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3.
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The frequencies of the electromagnetic spectrum with the highest energy are
of:
a. | infrared light. | b. | X rays. | c. | gamma
rays. | d. | microwaves. |
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4.
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What is the process of making light from heat called?
a. | Photoluminescence | b. | Photosynthesis | c. | Incandescence | d. | Refraction |
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5.
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The use of fluorescent lights is more economical than incandescent lights
because fluorescent bulbs:
a. | produce more heat than light. | b. | emit four times more light from the same amount
of electricity. | c. | emit light from a hot, wire filament. | d. | can be used for hatching baby chicks as well as
for lighting. |
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6.
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The smallest amount of light is a tiny wave-bundle called a(n):
a. | electron. | b. | atom. | c. | proton. | d. | photon. |
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7.
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The frequency of visible light with the highest energy is seen as the
color:
a. | red. | b. | yellow. | c. | blue. | d. | violet. |
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8.
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MOST of the objects we see are visible to us because:
a. | they refract light. | b. | they diffract light. | c. | they reflect
light. | d. | they emit light. |
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9.
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Photoreceptors commonly called cone cells respond to:
a. | red, green, and blue. | b. | yellow, cyan, and magenta. | c. | black, white, and
gray. | d. | yellow, cyan, magenta, and black. |
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10.
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Rod cells respond to:
a. | white, black, and gray. | b. | red, white, and blue. | c. | red, green, and
blue. | d. | red, yellow, and blue. |
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11.
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The eyes of people who are color blind lack:
a. | a retina. | b. | rod cells. | c. | cone
cells. | d. | all photoreceptors. |
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12.
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The colors often called the additive primary colors are:
a. | red, white, and blue. | b. | cyan, magenta, and yellow. | c. | red, green, and
blue. | d. | red, yellow, and blue. |
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13.
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The portion of the electromagnetic spectrum most useful to living things
is:
a. | black light. | b. | infrared radiation. | c. | ultraviolet
radiation. | d. | visible light. |
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14.
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The colors often called the subtractive primary colors are:
a. | red, white, and blue. | b. | cyan, magenta, and yellow. | c. | red, yellow, and
blue. | d. | red, green, and blue. |
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15.
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When cone cells are stimulated by red light, green light, and blue light we
see:
a. | “black” light. | b. | white light. | c. | brown
light. | d. | gray light. |
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16.
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Light travels in straight lines while in a material. Physicists call imaginary
lines used to represent light in optical diagrams:
a. | light beams. | b. | sunbeams. | c. | light
rays. | d. | spectral lines. |
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17.
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If light bounces off the surface of a material, the change in direction is
called:
a. | refraction. | b. | reflection. | c. | diffusion. | d. | interference. |
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18.
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Light shining through a bottle of water is often bent. The change in direction
is called:
a. | refraction. | b. | reflection. | c. | diffusion. | d. | interference. |
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19.
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While light is traveling in a material of uniform optical characteristics
it:
a. | travels in straight lines. | b. | may be refracted. | c. | may be
reflected. | d. | changes speed. |
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20.
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A swimming pool does not appear as deep as it actually is because the light
is:
a. | diffused. | b. | diffracted. | c. | refracted. | d. | reflected |
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21.
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 When light passes, as shown in the illustration above,
from a material with a smaller index of refraction into a material with a higher index of refraction
it will: a. | travel straight through with no bending. | b. | be bent toward the
normal. | c. | be bent away from the normal. | d. | travel down the
normal. |
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22.
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Which diagram correctly illustrates light rays as they pass through a converging
lens?
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23.
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The diagram shows a converging lens.  Which letter shows the
focal point(s)?
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24.
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The diagram below represents a ray of green light passing through a glass prism
(n =1.61).  If the same light were to pass through a prism made of
diamond (n = 2.42), the path of the light would be best represented by:
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25.
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An object is placed in front of a mirror as shown in the diagram
below:  Which diagram represents the image of that object in
the mirror?
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26.
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Infrared rays have a shorter wavelength than
a. | ultraviolet rays. | c. | radar waves. | b. | X-rays. | d. | gamma rays. |
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27.
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The full range of frequencies of electromagnetic radiation is called
a. | visible light. | c. | the electromagnetic spectrum. | b. | radio
waves. | d. | invisible
radiation. |
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28.
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The waves with the longest wavelengths in the electromagnetic spectrum
are
a. | infrared rays. | c. | gamma rays. | b. | radio waves. | d. | X-rays. |
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29.
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The visible light spectrum ranges between
a. | radar waves and X-rays. | c. | infrared rays and ultraviolet
rays. | b. | television waves and infrared rays. | d. | ultraviolet rays and gamma
rays. |
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30.
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Cellular telephones utilize
a. | radar waves. | c. | very low frequency waves. | b. | very high frequency
waves. | d. | microwaves. |
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31.
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X-ray photographs show softer tissue
a. | as invisible. | c. | the same as dense bones. | b. | as dark, highly
exposed areas. | d. | as bright
white areas. |
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32.
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Which of the following occurs as a light wave bends when it passes from one
medium into another?
a. | constructive interference | c. | destructive
interference | b. | refraction | d. | reflection |
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33.
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Polarized sunglasses work by
a. | blocking light waves that vibrate in one plane. | b. | gradually refracting
light as it passes through the lenses. | c. | bending light as it passes from air into the
lenses. | d. | reflecting most of the light that strikes the
sunglasses. |
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34.
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Newton’s prism experiments showed that white sunlight is made up of
a. | the full electromagnetic spectrum. | c. | all the colors of the visible
spectrum. | b. | only blue light when separated by a prism. | d. | only the longest
wavelengths. |
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35.
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Which kind of light is used to carry information through optical fibers?
a. | incandescent | c. | sodium-vapor light | b. | fluorescent | d. | laser |
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Short Answer
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36.
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List three characteristics of light.
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37.
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Another name for the subtractive process is the CMYK color process. What do the
letters CMYK represent?
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38.
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Prisms are flat polished surfaces that cause light to change direction. Name
three optical devices in which prisms are used.
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The diagram below represents a light ray striking a surface. Answer the
following questions based upon this diagram.  Figure 10-1
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39.
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What does the dotted line in Figure 10-1 represent?
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40.
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In Figure 10-1, which angle would be identified as the angle of
incidence?
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41.
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In Figure 10-1, what interaction is being represented between the ray and the
surface?
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The index of refraction for 3 substances are given in the table
below. Material | Index of
Refraction | Air | 1.00 | Water | 1.33 | Glass | 1.65 | | |
Use these values and your understanding of
refraction to identify the unknown substances in the diagrams that follow.
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42.
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The diagrams below represent light traveling from water (A) into an unidentified
material (B). Using the names Air, Water, and Glass, label each diagram with the correct name for
substance B.  | | a. ______ | b. ______ | c.
______ | | | | |
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Essay
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43.
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In the picture below, the person sees the image of the fish in a different
location than the actual fish.  Explain why the fish appears closer to the surface
than its actual location.
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