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Describe the net disturbance that occurs when two or more wave pulses or waves overlap.
Describe the net disturbance that occurs when two or more wave pulses or waves overlap.
Wave interference is the interaction of two or more waves.
Wave interference is the interaction of two or more waves.
Visual representations of wave pulses are useful in determining the result of two interacting pulses.
When two or more wave pulses or waves interact with each other, they travel through each other and overlap rather than bouncing off each other.
When two or more pulses overlap, the resulting displacement can be determined by adding the displacements of the pulses. This is called superposition.
Simulation: Wave Pulse Interference and Superposition
Simulation: Wave Pulse Interference and Superposition
Wave interference may be constructive or destructive.
Wave interference may be constructive or destructive.
When the displacements of the superposed waves are in the same direction the interaction is called constructive interference.
When the displacements of the superposed waves are in opposite directions the interaction is called destructive interference.
Two or more traveling waves can interact in such a way as to produce amplitude variations in the resultant wave.
Superposition of Transverse Waves
Superposition of Transverse Waves
Two or more traveling waves can interact in such a way as to produce amplitude variations in the resultant wave.
Standing waves are the result of the interference between two waves confined to a region that are traveling in opposite directions.
Standing waves are the result of the interference between two waves confined to a region that are traveling in opposite directions.
Visual representations of standing waves are useful in determining the relationships between length of the region, wavelength, frequency, wave speed and harmonic.
Regions can include pipes with open and/or closed ends.
Regions can include strings with fixed or loose ends.
Standing waves have nodes and antinodes.
Standing waves have nodes and antinodes.
- A node is a point on the standing wave where the amplitude is always zero.
- An antinode is a point on the standing wave where the amplitude is maximum.
The possible wavelengths of a standing wave are determined by the size and boundary conditions of the region to which it is confined.
The possible wavelengths of a standing wave are determined by the size and boundary conditions of the region to which it is confined.
1st Harmonic
2nd Harmonic
3rd Harmonic
1st Harmonic
3rd Harmonic
5th Harmonic
For a standing wave, the longest possible wavelength is called the fundamental or first harmonic. The second longest wavelength is called the second harmonic, and so on.
For a standing wave, the longest possible wavelength is called the fundamental or first harmonic. The second longest wavelength is called the second harmonic, and so on.
1st Harmonic
2nd Harmonic
3rd Harmonic
Beats arise from the addition of two waves of slightly different frequency.
Beats arise from the addition of two waves of slightly different frequency.
Waves with different frequencies are sometimes in phase and sometimes out of phase at locations along the waves resulting in periodic amplitude changes of the resultant wave.
The beat frequency is the difference in the frequencies of the two waves.
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