Critical Thinking Items
13.1 Types of Waves
Give an example of a wave that propagates only through a solid.
- Light wave
- Sound wave
- Seismic wave
- Surface wave
Can mechanical waves be periodic waves?
- No, mechanical waves cannot be periodic waves.
- Yes, mechanical waves can be periodic.
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The density of the medium varies with every cycle.
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The mass of the medium varies with every cycle.
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The resistivity of the medium varies with every cycle.
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The volume of the medium varies with every cycle.
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L-wave
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P-wave
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S-wave
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R-wave
13.2 Wave Properties: Speed, Amplitude, Frequency, and Period
If the horizontal distance, that is, the distance in the direction of propagation, between a crest and the adjacent trough of a sine wave is 1 m, what is the wavelength of the wave?
- 0.5 m
- 1 m
- 2 m
- 4 m
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The wavelength difference between P-waves and S-waves is used to measure the distance to the epicenter.
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The time difference between P-waves and S-waves is used to measure the distance to the epicenter.
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The frequency difference between P-waves and S-waves is used to measure the distance to the epicenter.
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The phase difference between P-waves and S-waves is used to measure the distance to the epicenter.
Two identical waves superimpose in pure constructive interference. What is the height of the resultant wave if the amplitude of each of the waves is 1 m?
- 1 m
- 2 m
- 3 m
- 4 m
13.3 Wave Interaction: Superposition and Interference
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\frac{X}{2}
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X
-
2X
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X^{2}
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Seismic waves
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Pulse wave
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Standing waves
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Electromagnetic waves
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Conductivity
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Opacity
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Ductility
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Density
What is added together when two waves superimpose?
- Amplitudes
- Wavelengths
- Velocities