Waves

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 Author: algebrageek ID: 194648 Filename: Waves Updated: 2013-01-23 08:47:07 Tags: physics Folders: Description: AS AQA A Physics waves key terms Show Answers:

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1. Wave speed (ms-1)
2. Amplitude (m)
Maximum displacement of a vibrating particle from its mean/equilibrium postion.
3. Wavelength (m)
Least distance between two adjacent points that are in phase.
4. Period (s)
Time for one complete cycle.
5. Frequency (Hz)
• Number of cycles per unit time.
6. Intensity (Wm-2)
• A= amplitude
7. Compression
When the particles in a material are bunched together (high pressure).
8. Rarefaction
When the particles in a material are widely spaced (low pressure).
9. Peak
Maximum [amplitude?] of a wave
10. Trough
The minimum [amplitude] of a wave.
11. Mean position
• Rest position.
• Position about which an oscillator oscillates.
How far an oscillator is through a cycle.
13. Phase difference
Difference between the phases of two waves/oscillators.
14. Longitudinal
Displacement is parallel to the direction of energy transfer.
15. Transverse
Displacement is perpendicular to the energy transfer.
16. Ray
• Point on the direction of the energy transfer.
• Perpendicular to the wavefronts.
17. Wavefront
Parts of a wave that are moving together with the same phase.

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