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.
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
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
What is added together when two waves superimpose?
- Amplitudes
- Wavelengths
- Velocities