CP PHYSICS
WAVES REVIEW
I.
Name: ____________________________
____ period
Matching
A.
B.
C.
D.
E.
F.
crest
trough
medium
amplitude
wavelength
period
G.
H.
I.
J.
K.
frequency
mechanical wave
electromagnetic wave
longitudinal wave
transverse wave
L.
M.
N.
O.
P.
hertz
interference
reflection
refraction
diffraction
1.
_____ the low point of a transverse wave
2.
_____ waves that require a medium
3.
_____ bending of a wave as it enters a new medium
4.
_____ the maximum displacement of the wave from equilibrium
5.
_____ waves that can travel through empty space
6.
_____ unit for measuring frequency
7.
_____ a traveling wave which causes matter to move perpendicular to the direction of the
wave
8.
_____ the length of a wave from crest to crest or trough to trough
9.
_____ bending of a wave around a barrier
10.
_____ a wave which causes matter to move back and forth parallel to the direction of the
wave
11.
_____ the high point of a transverse wave
12.
_____ the bouncing back of a wave from a surface
13.
_____ the number of waves that pass a certain point each second
14.
_____ the result of waves moving through each other
15.
_____ the time it takes for one complete vibration
16.
_____ the material through which a wave travels
II.
Fill in the Blank
1.
A wave transfers ________________ from one place to another.
2.
A wave with a great amount of energy has a large ___________________.
3.
Two waves travel through the same medium. They must have the same ______________.
If the wavelength of wave “A” is four times that of wave “B”, the frequency of “A” is
________ that of “B”.
CP PHYSICS, WAVES REVIEW, page 2
4.
Water waves are (transverse, longitudinal) and (electromagnetic, mechanical).
5.
Radio waves are (electromagnetic, mechanical) because they do not need a ____________.
6.
All electromagnetic waves are (transverse, longitudinal).
7.
Refraction occurs because the new medium changes the wave’s _______________.
8.
The angles at which a wave hits and reflects from a boundary are always ______________.
9.
Sound waves bend around a corner because their _________________________ is large
compared to the size of the opening. This spreading is called _______________________.
10.
_____________________ is the decrease in the __________________of a wave due to
energy lose in overcoming _____________________ and due to the spreading out of the
wave front.
11.
The period of a pendulum is affected by its ________________, not by its ___________
or ______________________.
12.
Waves reflected from a flexible boundary are (inverted, erect).
13.
Waves reflected from a rigid boundary are (inverted, erect).
14.
When a wave reaches a new medium which is very different from the old, most of the wave
will be _____________________ and a little will be ____________________.
15.
When a wave passes into a new medium, its _____________________ does not change, but
its _______________________ and ________________________ do change.
III.
Short Answer Questions
1.
A long spring passes along the floor of a room and out a door. A pulse is sent along the
spring. After a while, an inverted pulse of almost the same amplitude returns along the
spring. Is the spring attached to the wall in the next room or is it lying loose on the floor?
EXPLAIN.
2.
When a wave reaches the boundary of a new medium, part of the wave is reflected and
part is transmitted. What determines the amount of reflection?
3.
What occurs during constructive interference?
CP PHYSICS, WAVE REVIEW, page 3
4.
What occurs during destructive interference?
5.
What is the major difference between mechanical waves and electromagnetic waves?
6.
What determines the speed of a mechanical wave?
7.
You stand in the back left corner of a racquetball court and hit the ball to the middle of the
front wall. Your opponent should stand where to return the ball? Why?
8.
What is the difference between a pulse and a wave train?
9.
What is the Doppler effect? What appears to happen to the wave’s frequency if the source
moves toward the receiver? away from the receiver?
10.
What are some practical uses of the Doppler effect?
IV.
Problems
1.
The speed of sound in air is 346 m/s. A sound wave has a frequency of 750.0 Hz. What is
its wavelength?
2.
It is observed that a wave crest hits the shore every 12 s. The distance between successive
crests is 3.2 m. What is the velocity of the wave?
CP PHYSICS, WAVE REVIEW, page 4
3.
What is the frequency of a wave that has period of 3.75 seconds?
4.
Waves of frequency 2.0 Hz are generated along a spring. The waves have a wavelength of
0.45 m.
a. What is the speed of the waves along the spring?
b. What is the wavelength of the waves along the spring if their frequency is increased to
6.0 Hz?
5.
What is the period of a sound wave that has a frequency of 245 Hz?
6.
What is the period of a pendulum on Earth if it has a string that is 0.85 m long?
7.
What is the period of pendulum on the moon where gravity is 1.6 m/s2 if the length of the
pendulum is 0.75 m long?
8.
The speed of a transverse wave along a slinky is 3.4 m/s. If the wave has a wavelength of
0.25 m, then what is its frequency?
9.
A sound wave travels 1200 m in 3.6 s. The period of its oscillation is 0.0045 s.
a. What is the speed of the sound wave?
b. What is its wavelength?
10.
What is the velocity of a water wave that has a wavelength of 14.8 m and a period of 1.2 s?