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Standing Waves and Doppler Effect

Total questions: 25

Worksheet time: 23mins

Name
Class
Date
1.

Standing waves are created by

a)

Two identical waves reflecting off each other

b)

Two identical waves being diffracted together

c)

Two identical waves move through each other in opposite directions

d)

Two identical waves are diffracted from two identical sources

2.

Two wave pulses one with a positive amplitude the other with equal negative amplitude travel on a cord approaching each other. What is the result of the oscillations when the pulses reach the same point?

a)

It is constructive interference with twice the amplitude

b)

It is destructive interference with zero amplitude

c)

It is constructive interference with slightly greater amplitude

d)

It is constructive interference with the negative amplitude

e)

The standing wave is produced

3.

Two wave pulses with equal positive amplitudes travel on a cord approaching each other. What is the result of the oscillations when the pulses reach the same point?

a)

It is constructive interference with twice the amplitude

b)

It is destructive interference with zero amplitude

c)

It is constructive interference with slightly greater amplitude

d)

It is constructive interference with the negative amplitude

e)

The standing wave is produced

4.

In the diagram which letters represent the nodes

a)

A B C

b)

A C E

c)

B D

d)

B D E

e)

A C D

5.
Which harmonic is shown?
a)
1st
b)
2nd
c)
3rd
d)
4th
6.

How many antinodes does this standing wave have?

a)

5

b)

6

c)

7

d)

8

7.
This is an example of which type of wave behavior?
a)
Reflection
b)
Diffraction
c)
Constructive Interference
d)
Destructive Interference
8.

What type of interference is represented in the diagram?

a)

Constructive

b)

Destructive

9.

The figure shows several modes of vibration of a string fixed at both ends. WHICH NUMBER represents the fifth harmonic?

a)

1

b)

2

c)

3

d)

4

e)

None of these is correct.

10.

The TOTAL string length pictured is 2 meters in length.  What is the SIZE of a SINGLE (1) wavelength?

a)

1 meter

b)

0.5 meters

c)

4 meters

d)

8 meters

11.

Which of the following is the speed of a wave traveling with a wavelength λ, frequency f, and period T?

a)

v=λfv=\frac{\lambda}{f}

b)

v=fλv=\frac{f}{\lambda}

c)

v=λ⋅fv=\lambda\cdot f

d)

v=f⋅Tv=f\cdot T

e)

v=fTv=\frac{f}{T}

12.

Which of the following standing waves is traveling at the greatest speed (like our class lab using Wigglers)?

*Note: We did NOT change the tension.

a)

1

b)

2

c)

3

d)

5

e)

ALL are traveling at the SAME speed

13.

Which of the of the pictured Standing Waves has the greatest/largest wavelength?

a)

5

b)

4

c)

3

d)

2

e)

1

14.
Long sound waves are...
a)
high pitched
b)
low pitched
c)
medium pitched
15.
Short sound waves are...
a)
high pitched
b)
low pitched
c)
medium pitched
16.
When the car moves AWAY from you, its horn seems...
a)
Low pitched
b)
High pitched
c)
Normal
17.
When an ambulance move TOWARD you it sounds ________ pitched. 
a)
high
b)
low
c)
medium
18.
The Doppler effect is seen when a wave-making source moves toward an observer. 
a)
True
b)
False
19.
The Doppler effect occurs when an observer moves towards a wave-making source. 
a)
True
b)
False
20.
What can you tell about this object's motion?
a)
Moving to the North (up).
b)
Moving to the South (down). 
c)
Moving to the West (left). 
d)
Moving to the East (right). 
21.

What is the Doppler Effect?

a)

A change in frequency due to the relative motion of a wave source and an observer

b)

When a wave overlaps with another wave

c)

When a wave bounces off of another object

d)

When a wave bends due to traveling through a different medium

22.

The pitch of a sound wave relates to the wave's _________________.

a)

Amplitude

b)

Frequency

c)

Wavelength

d)

Period

23.

As objects move in space, their wavelengths change. This phenomenon is called the...

a)

Coriolis Effect

b)

Doppler Effect

c)

Movement Effect

d)

Black Hole Effect

24.

When objects move towards you, the wavelength....

a)

Increases (gets longer)

b)

Decreases (gets shorter)

25.

What happens to the wavelength and frequency of a wave as an object moves TOWARDS us?

a)

Wavelength = decreases

Frequency = increases

b)

Wavelength = increases

Frequency = increases

c)

Wavelength = increases

Frequency = decreases

d)

Wavelength = decreases

Frequency = decreases

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