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Properties of Waves

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Properties of Waves

Pgs 10 - 13

- The property of a wave that is related to the height of a wave is amplitude.
- The maximum distance the wave vibrates from rest position.
- The rest position is where the particles stay when there are no disturbances.

- Larger amplitude means more energy is used to make that wave.
- A smaller amplitude means less energy is used to make that wave.
- Amplitude can be a measure of energy in a wave.

- The distance between any two adjacent crests or compressions in a series of waves is the wavelength.
- The wavelength can be measured from troughs and rarefactions as well.

- The number of waves produced in a given amount of time is frequency.
- You can count the number of crests/troughs/compressions/rarefactions that occur.
- Frequency is expressed in Hertz (Hz).
- 1 Hz = 1 wave /second.

- The higher the frequency a wave has, the more energy the wave is carrying.
- Also, the wavelength is closely related to frequency.
- Therefore, the shorter the wavelength a wave has, the more energy it is carrying and vice versa.

- The speed at which a wave travels is wave speed.
- This is the distance traveled divided by the time it takes to travel.
- Sound in air travels at 340m/s .
- Sound in steel travels 5200m/s.

- Wave speed is calculated by using wavelength and frequency.
- Speed is symbolized with a (v)
- Wavelength is symbolized with a (λ)
- Frequency is symbolized with a (f)
- V = λ x f
- What is the wave speed of a wave that has a wavelength of .5 m and frequency of 3 Hz?