Name:     Period: 
 
    Email: 
Note:  These "Exam" results are submitted to Mr. Morrison at admin@mobiophys.com
The exact SAME QUESTIONS Along with DETAILED EXPLANATIONS can be found here Online Exam Index Link
by choosing the corresponding  "STUDY GUIDE VERSION"

Waves Exam - 84 Questions

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

The source of all wave motion is a
a.
region of variable high and low pressure.
b.
vibration.
c.
movement of matter.
d.
harmonic object.
 

 2. 

The time needed for a wave to make one complete cycle is its
a.
frequency.
b.
velocity.
c.
amplitude.
d.
period.
e.
wavelength.
 

 3. 

The distance between successive identical parts of a wave is called its
a.
frequency.
b.
period.
c.
velocity.
d.
amplitude.
e.
wavelength.
 

 4. 

The Hertz is a
a.
special radio wave.
b.
type of car.
c.
unit of period.
d.
unit of wavelength.
e.
unit of frequency.
 

 5. 

A wave created by shaking a rope up and down is called a
a.
Doppler wave.
b.
standing wave.
c.
longitudinal wave.
d.
constructive wave.
e.
transverse wave.
 

 6. 

Which of the following is NOT a transverse wave?
a.
light.
b.
radio wave.
c.
sound.
d.
all of the above.
e.
none of the above
 

 7. 

When two or more waves are at the same place at the same time, the resulting effect is called
a.
a standing wave.
b.
a Doppler wave.
c.
a shock wave.
d.
interference.
e.
a period.
 

 8. 

Where can you touch a standing wave on a rope without disturbing the wave?
a.
At a node
b.
At any place along the wave
c.
At an antinode
 

 9. 

Suppose a bug is jiggling up and down and swimming towards you at the same time. Compared to the frequency at which the bug is emitting waves, the frequency of the waves reaching you is
a.
lower.
b.
higher.
c.
just the same.
 

 10. 

As the sound of a car's horn passes and goes away from you, the pitch of the horn seems to
a.
increase.
b.
stay the same.
c.
decrease.
 

 11. 

When a sound source moves towards you, what happens to the wave speed?
a.
It decreases.
b.
It increases.
c.
It stays the same.
 

 12. 

You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves
a.
lengthens.
b.
stays the same.
c.
shortens.
 

 13. 

The Doppler effect occurs when a source of sound moves
a.
away from you.
b.
toward you.
c.
both A and B
d.
none of the above
 

 14. 

A sound wave that has a higher frequency has a wavelength that is
a.
shorter.
b.
longer.
 

 15. 

Two waves arrive at the same place at the same time exactly in step with each other. Each wave has an amplitude of 2.5 m. The resulting wave has an amplitude of
a.
0.6 m.
b.
1.3 m.
c.
2.5 m.
d.
5.0 m.
e.
10.0 m.
 

 16. 

A certain ocean wave has a frequency of 0.07 hertz and a wavelength of 10 meters. What is the wave’s speed?
a.
0.07 m/s
b.
0.70 m/s
c.
1.0 m/s
d.
10 m/s
e.
143 m/s
 

 17. 

A weight on the end of a spring bobs up and down one complete cycle every 4.0 seconds. Its frequency is
a.
0.25 hertz.
b.
4.0 hertz.
c.
none of the above.
 

 18. 

A leaf on a pond oscillates up and down two complete cycles each second as a water wave passes. What is the wave's frequency?
a.
0.5 hertz
b.
1 hertz
c.
2 hertz
d.
3 hertz
e.
6 hertz
 

 19. 

Radio waves travel at the speed of light, 300,000,000 m/s. The wavelength of a radio wave received at 200 megahertz (200,000,000 Hz) is
a.
0.7 m.
b.
1.5 m.
c.
6.7 m.
d.
15 m.
 

 20. 

Compared to the speed of light, sound travels
a.
faster.
b.
at about the same speed.
c.
slower.
 

 21. 

Sound waves are produced by
a.
radio stations.
b.
vibrating objects.
c.
soft objects.
d.
objects under pressure.
e.
none of the above
 

 22. 

Sound waves in air are a series of
a.
periodic disturbances.
b.
periodic condensations and rarefactions.
c.
high- and low-pressure regions.
d.
all of the above
e.
none of the above
 

 23. 

Which of the following would be most likely to transmit sound with the highest speed?
a.
Steel in a bridge
b.
Wood in a cabinet
c.
Water in the ocean
d.
Water in a swimming pool
e.
Air in your classroom
 

 24. 

Sound waves cannot travel in
a.
steel.
b.
air.
c.
a vacuum.
d.
water.
e.
Sound can travel in all of the above.
 

 25. 

The speed of a sound wave depends on
a.
the air temperature.
b.
its frequency.
c.
its wavelength.
d.
all of the above
e.
none of the above
 

 26. 

Noise-canceling earphones are an example of
a.
constructive interference.
b.
destructive interference.
c.
beats.
d.
resonance.
 

 27. 

Beats can be heard when two tuning forks
a.
are sounded together.
b.
have almost the same frequency and are sounded together.
c.
have the same frequency and are sounded together.
d.
all of the above
e.
none of the above
 

 28. 

An explosion occurs 340 km away. Given that sound travels at 340 m/s, the time the sound takes to reach you is
a.
1 s.
b.
10 s.
c.
100 s.
d.
200 s.
e.
more than 200 s.
 

 29. 

The speed of sound in dry air at 20 degrees Celsius is 340 m/s. How far away is a jet plane when you notice a 2-second delay between seeing the plane and hearing it?
a.
20 m
b.
40 m
c.
340 m
d.
680 m
e.
6,800 m
 

 30. 

A sound wave that has a wavelength of 2 m in room-temperature air has a frequency of about
a.
170 Hz.
b.
1360 Hz.
c.
2040 Hz.
d.
none of the above
 

 31. 

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic sound that travels 1530 m/s in seawater, and finds a 10-second time delay of the echo to the ocean floor and back. The ocean depth there is
a.
1700 m.
b.
3400 m.
c.
7650 m.
d.
15,300 m.
e.
none of the above
 

 32. 

Electromagnetic waves are
a.
transverse waves.
b.
longitudinal waves.
 

 33. 

Electromagnetic waves
a.
need a medium to travel through.
b.
can travel through a vacuum.
 

 34. 

Which of these electromagnetic waves has the highest frequency?
a.
Infrared waves
b.
Light waves
c.
Radio waves
d.
X-rays
e.
Ultraviolet waves
 

 35. 

Compared to the wavelength of ultraviolet waves, the wavelength of infrared waves is
a.
the same.
b.
shorter.
c.
longer.
 

 36. 

Compared to the velocity of radio waves, the velocity of visible light waves is
a.
slower.
b.
faster.
c.
the same.
 

 37. 

Which of the following are fundamentally different from the others?
a.
Gamma rays
b.
Radio waves
c.
Sound waves
d.
Light waves
e.
X-rays
 

 38. 

If the sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes
a.
to operate receiving equipment in the dark.
b.
for light to travel from the sun to Earth.
c.
for the sun to disappear.
d.
all of the above
e.
none of the above
 

 39. 

Which of the following is NOT an electromagnetic wave?
a.
Sound
b.
Radio
c.
Light
d.
Infrared
e.
X-ray
 

 40. 

Heat lamps give off mostly
a.
X-rays.
b.
infrared waves.
c.
ultraviolet waves.
d.
microwaves.
e.
radio waves.
 

 41. 

Electromagnetic waves with higher frequencies have wavelengths that are
a.
shorter.
b.
longer.
 

 42. 

Light waves are
a.
longitudinal waves.
b.
transverse waves.
 

 43. 

The primary purpose of polarized sunglasses is_____.
a.
to block ultraviolet rays.
b.
to block infrared rays.
c.
to block glare from reflections (for example off lakes or roads).
d.
to look cool.
 

 44. 

If two polarizing filters are held with their polarization axes at right angles to each other, the amount of light transmitted compared to when their axes are parallel is
a.
zero.
b.
half as much.
c.
the same.
d.
twice as much.
 

 45. 

An echo occurs when sound
a.
is transmitted through a surface.
b.
is reflected from a distant surface.
c.
changes speed when it strikes a distant surface.
d.
all of the above
e.
none of the above
 

 46. 

Refraction occurs
a.
when a wave changes speed.
b.
only with light waves.
c.
at any unpredictable time.
d.
all of the above
 

 47. 

You can hear noises a long distance away over water at night because
a.
of lowered temperatures in the sky.
b.
water conducts sound better at night.
c.
sound is reflected off water more efficiently at night.
d.
refraction of sound in cool air keeps the sound wave low.
 

 48. 

A penny lies in the bottom of a tea cup filled with water. As you look down on the penny, compared to its actual depth, it looks
a.
closer.
b.
farther away.
c.
at the same depth.
 

 49. 

A mirage can occur
a.
when cooler air is above hotter air.
b.
when there’s a layer of hot air close to the ground.
c.
on a hot day.
d.
all of the above
e.
none of the above
 

 50. 

When you see a "wet spot" mirage on the road in front of you, you are most likely seeing
a.
water.
b.
hot air.
c.
a figment of your imagination.
d.
sky.
e.
none of the above
 

 51. 

When a light beam emerges from water into air, the average light speed
a.
remains the same.
b.
decreases.
c.
increases.
 

 52. 

The effect that we call a mirage has most to do with
a.
reflection.
b.
refraction.
c.
diffraction.
d.
interference.
e.
scattering.
 

 53. 

A person standing waist-deep in a swimming pool appears to have short legs because of light
a.
refraction.
b.
interference.
c.
diffraction.
d.
reflection.
e.
absorption.
 

 54. 

Different colors of light travel at different speeds in a transparent medium. In a vacuum, different colors of light travel at
a.
the same speed.
b.
different speeds.
 

 55. 

The spectrum produced by a prism or a raindrop is evidence that the average speed of light in the material depends on the light's
a.
transmission qualities.
b.
color.
c.
wave nature.
d.
particle nature.
 

 56. 

Which of the following is a consequence of the refraction of light?
a.
rainbows
b.
mirages
c.
internal reflection
d.
all of the above
e.
none of the above
 

 57. 

In a curved optical fiber, light
a.
gains energy in each internal reflection.
b.
internally reflects in a succession of straight-line paths.
c.
bends and follows the curve of the fiber.
d.
scatters in random directions from the fiber's inner surface.
 

 58. 

Constructive interference occurs when
a.
the crest of one wave meets the trough of another wave.
b.
two waves of the same color overlap.
c.
the crests of two waves overlap.
d.
all of the above
e.
none of the above
 

 59. 

Destructive interference occurs when
a.
the crests of two waves overlap.
b.
two waves of the same color overlap.
c.
the crest of one wave meets the trough of another wave.
d.
all of the above
e.
none of the above
 

 60. 

When a laser light shines through two closely spaced narrow slits and onto a screen some distance away, the pattern on the screen has
a.
no light in it.
b.
two large bright spots.
c.
alternating dark and light bands.
d.
one large bright spot.
e.
none of the above
 

 61. 

Interference can be shown by using
a.
water waves.
b.
light waves.
c.
sound waves.
d.
all of the above
e.
none of the above
 

True/False
Indicate whether the sentence or statement is true or false.
 

 62. 

The time for a complete to and fro swing of a pendulum is its frequency.
 

 63. 

The amplitude of a wave is the vertical distance from the midpoint to either the crest or the trough of the wave.
 

 64. 

The distance between successive identical parts of a wave is its displacement.
 

 65. 

The number of times a wave vibrates each second is its period.
 

 66. 

A wave on a rope whose motion is at right angles to the direction of wave propagation is a longitudinal wave.
 

 67. 

Sound waves are examples of longitudinal waves.
 

 68. 

When the high part of one wave fills in the low part of another wave, constructive interference occurs.
 

 69. 

As a light source is coming towards you, you see light of a frequency higher than the source it emits.
 

 70. 

A pulse of compressed air that is part of a sound wave is a rarefaction.
 

 71. 

Sound can travel through solids, liquids, gases, and even a vacuum.
 

 72. 

In order for sound from a speaker to reach a listener, air near the speaker must travel to the listener.
 

 73. 

Energy emitted by vibrating electric charges is carried by electromagnetic waves.
 

 74. 

Polarization occurs when waves vibrate in a single direction.
 

 75. 

The distance light travels in one year is called a light-year.
 

 76. 

Electromagnetic heat waves are called ultraviolet waves.
 

 77. 

Infrared waves are responsible for sunburn.
 

 78. 

Mirages occur because of the reflection of light on a hot day.
 

 79. 

The separation of light into colors arranged according to their frequency is dispersion.
 

 80. 

Total internal reflection occurs when a light ray hits a surface at an angle greater than the critical angle.
 

 81. 

When a wave reaches a boundary between two media, in most cases some of the wave is  refracted.
 

 82. 

When you shine a waterproof light from underwater toward the surface of the water, there is a certain angle at which no light is refracted above the water and all the light is reflected back.
 

 83. 

Interference patterns are produced when two sources of waves are placed side by side.
 

 84. 

Two stereo speakers can be set side by side so there are some places in front of them where sound is very diminished.
 

Essay
 

 85. 

What is the difference between a transverse wave and a longitudinal wave? Give examples of each.
 

 86. 

What is refraction? Why does it occur? Give examples of sound refraction and light refraction.
 

 87. 

What is a rainbow? How is it formed? Be specific.
 

 88. 

What is total internal reflection? When does it happen? Why do diamonds sparkle so much?
 

 89. 

What is interference? What are the two types of interference? When does each occur? Give evidence of interference.
 



 
Submit          Reset Help