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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Part
of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil
that extends out of the water. What is this phenomenon called? a. | interference | c. | diffraction | b. | refraction | d. | reflection | | | | |
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2.
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Refraction is the term for the bending of a wave disturbance as it passes at an angle
from one ____ into another. a. | glass | c. | area | b. | medium | d. | boundary | | | | |
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3.
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Which
is an example of refraction? a. | A parabolic mirror in a headlight focuses light into a
beam. | b. | A fish appears closer to the surface of the water than it
really is when observed from a riverbank. | c. | In a mirror, when you lift your right arm, the left arm of your
image is raised. | d. | Light is bent slightly around
corners. | | |
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4.
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The
____ of light can change when light is refracted because the wavelength changes. a. | frequency | c. | color | b. | media | d. | transparency | | | | |
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5.
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Light
is NOT refracted when it is a. | traveling from air into a glass of water at an angle of
35° to the
normal. | b. | traveling from water into air at an angle of 35° to the
normal. | c. | striking a wood surface. | d. | traveling from
air into a diamond at an angle of 45°. | | |
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6.
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When
light passes at an angle to the normal from one material into another material in which its speed is
higher, a. | it is bent
toward the normal to the surface. | b. | it always lies along the normal to the
surface. | c. | it is unaffected. | d. | it is bent away
from the normal to the surface. | | |
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7.
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When
light passes at an angle to the normal from one material into another material in which its speed is
lower, a. | it is bent
toward the normal to the surface. | b. | it always lies along the normal to the
surface. | c. | it is unaffected. | d. | it is bent away
from the normal to the surface. | | |
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8.
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When
a light ray moves from air into glass at an angle of 45°, its path is a. | bent toward the
normal. | c. | parallel to the
normal. | b. | bent away from the normal. | d. | not bent. | | | | |
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9.
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When
a light ray passes from water (n = 1.333) into diamond (n = 2.419) at an angle of
45°, its path
is a. | bent toward the
normal. | c. | parallel to the
normal. | b. | bent away from the normal. | d. | not bent. | | | | |
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10.
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When
a light ray passes from zircon (n = 1.923) into fluorite (n = 1.434) at an angle of
60°, its path
is a. | bent toward the
normal. | c. | parallel to the
normal. | b. | bent away from the normal. | d. | not bent. | | | | |
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11.
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An
object is placed along the principal axis of a thin converging lens that has a focal length of 30.0
cm. If the distance from the object to the lens is 40.0 cm, what is the distance from the image to
the lens? a. | 17.3
cm | c. | 1.20
m | b. | –17.3
cm | d. | –1.20
m | | | | |
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12.
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An
object is placed 30.0 cm from a thin converging lens along the axis of the lens. The lens has a focal
length of 10.0 cm. What is the distance from the image to the lens? a. | 15.0
cm | c. | 60.0
cm | b. | –15.0
cm | d. | –60.0
cm | | | | |
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13.
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An
object is placed 6.0 cm from a thin converging lens along the axis of the lens. The lens has a focal
length of 9.0 cm. What is the distance from the image to the lens? a. | 3.0
cm | c. | 18
cm | b. | –3.0
cm | d. | –18
cm | | | | |
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14.
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An
object is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image
forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the
lens? a. | 30.0
cm | c. | 15.0
cm | b. | 10.0
cm | d. | 5.71
cm | | | | |
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15.
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An
object is placed 14.0 cm from a diverging lens. If a virtual image appears 10.0 cm from the lens on
the same side as the object, what is the focal length of the lens? a. | –50.0
cm | c. | –10.0
cm | b. | –35
cm | d. | –8.0
cm | | | | |
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16.
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An
object is placed 40.0 cm from a converging lens along the axis of the lens. If a virtual image forms
at a distance of 50.0 cm from the lens on the same side as the object, what is the focal length of
the lens? a. | 22.0
cm | c. | 90.0
cm | b. | 45.0
cm | d. | 2.00
m | | | | |
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17.
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A
film projector produces a 1.51 m image of a horse on a screen. If the projector lens is 4.00 m from
the screen and the size of the horse on the film is 1.07 cm, what is the magnification of the
image? a. | 141 | c. | 7.08
´
10–3 | b. | –14.1 | d. | –7.08 ´ 10–3 | | | | |
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18.
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A
candle that is 10.0 cm high is placed 30.0 cm in front of a diverging lens. The lens has a focal
length of –20.0 cm. What is the magnification of the image? a. | 2.50 | c. | 0.400 | b. | –0.400 | d. | –2.50 | | | | |
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19.
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An
object that is 18 cm from a converging lens forms a real image 22.5 cm from the lens. What is the
magnification of the image? a. | –1.25 | c. | –0.80 | b. | 1.25 | d. | 0.80 | | | | |
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20.
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A
converging lens has a focal length of 10.0 cm. If a virtual image of an object is formed 25.0 cm in
front of the lens, what is the magnification of the image? a. | –3.50 | c. | 1.50 | b. | 3.50 | d. | –1.50 | | | | |
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21.
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Which
of the following describes what will happen to a light ray incident on a glass-to-air boundary at
greater than the critical angle? a. | total reflection | c. | partial reflection, partial
transmission | b. | total transmission | d. | partial reflection, total
transmission | | | | |
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22.
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Atmospheric refraction of light rays is responsible for which effect? a. | spherical
aberration | c. | chromatic
aberration | b. | mirages | d. | total internal reflection in a
gemstone | | | | |
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23.
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If
atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be
changed? a. | Both would be
later. | b. | Both would be earlier. | c. | Sunrise would be
later, and sunset would be earlier. | d. | Sunrise would be earlier, and sunset would be
later. | | |
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24.
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Which
is NOT correct when describing the formation of rainbows? a. | A rainbow is
really spherical in nature. | b. | Sunlight is spread into a spectrum when it enters a spherical
raindrop. | c. | Sunlight is internally reflected on the back side of a
raindrop. | d. | The angle between the incident white light and the returning
violet ray is 45°. | | |
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Short Answer
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25.
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When
does refraction occur?
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26.
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Why
is it impossible to see an atom with a compound microscope?
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27.
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In a
refracting telescope, is the image upright or inverted? Explain.
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28.
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At
the end of the day, why are we able to see the sun after it has passed below the
horizon?
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29.
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What
atmospheric conditions produce a mirage?
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30.
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Why
do motorists sometimes see what appear to be wet spots on the road on a dry summer day?
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31.
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What
is dispersion?
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32.
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How
does white light passing through a prism produce a visible spectrum?
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33.
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What
does the perceived color of each water droplet in a rainbow depend on?
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34.
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A
student burns a hole in a pencil with a magnifying lens. What is the position and kind of image
produced by the lens? Draw a ray diagram to support your answer.
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