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Worksheets4 Waves - standing waves (Interference)
Total questions: 20
Worksheet time: 20mins
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?
It is constructive interference with twice the amplitude
It is destructive interference with zero amplitude
It is constructive interference with slightly greater amplitude
It is constructive interference with the negative amplitude
The standing wave is produced
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?
It is constructive interference with twice the amplitude
It is destructive interference with zero amplitude
It is constructive interference with slightly greater amplitude
It is constructive interference with the negative amplitude
The standing wave is produced
Standing waves are created by
Two identical waves reflecting off each other
Two identical waves being diffracted together
Two identical waves move through each other in opposite directions
Two identical waves are diffracted from two identical sources
In the diagram which letters represent the nodes
A B C
A C E
B D
B D E
A C D
How many antinodes does this standing wave have?
5
6
7
8
What type of interference is represented in the diagram?
Constructive
Destructive
What type of interference is represented in this diagram?
Constructive
Destructive
The figure shows several modes of vibration of a string fixed at both ends. WHICH NUMBER represents the fifth harmonic?
1
2
3
4
The 5th Harmonic is NOT pictured
The TOTAL string length pictured is 2 meters in length. What is the SIZE of a SINGLE (1) wavelength?
1 meter
0.5 meters
4 meters
8 meters
What is the EQUATION use for solving for the relationship of wave SPEED, Frequency, + Wavelength?
v=fλ
v=λf
v=λ⋅f
v=f⋅T
v=Tf
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.
1
2
3
5
ALL are traveling at the SAME speed
Which of the of the pictured Standing Waves has the greatest frequency?
5th harmonic
4th harmonic
3rd harmonic
2nd harmonic
Fundamental harmonic
Which of the of the pictured Standing Waves has the largest WAVELENGTH?
5th harmonic
4th harmonic
3rd harmonic
2nd harmonic
Fundamental harmonic (1st)
What do you notice about the WAVE SPEED of all of the standing waves produced in class (Wiggler Lab)?
They are all different
They are all the same speed
They change in irregular patterns
Observe the frequency of the Fundamental (Harmonic 1). What do you observe about the frequencies of each successive Harmonic?
*From 1 - 2 - 3 - 4 - 5
They are all increasing at exactly 2 Hz, increments of exactly the Fundamental frequency
They are all increasing at random intervals/frequencies
They all decrease at the same frequency increment
Based on the picture: WHICH of the following is FALSE?
*Assume the ends are exactly 2 meters apart!
We are viewing Harmonics #1, #2, + #3.
Letter C has the greatest frequency
Letters A, B, + C all have wavelengths of 2 meters
The fundamental harmonic has the lowest frequency but largest wavelength
