Sound and Light Ch. 1
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Created by:
Stella-Kibathi on February 29, 2012
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33 terms
Terms | Definitions |
|---|---|
 Wave | A disturbance that transfers energy from place to place |
| Energy | The ability to do work |
| Medium | Material through which a wave travels |
| Mechanical Wave | A wave that requires a medium through which to travel |
| Vibration | A repeated back-and -forth or up-and -down motion |
| Transverse Wave | A wave that moves the medium in a direction perpendicular to the direction in which the wave travels |
| Crest | The highest part of a transverse wave |
| Trough | The lowest part of a transverse wave |
| Longitudal Wave | A wave that moves the medium parallel to the direction in which the wave travels |
| Compression | The part of a longitudal wave where the particles of the medium are really close together |
| Rarefaction | The part of a longitudal wave where the particles of the medium are far apart |
| Surface Wave | A wave that occurs at the surface between two mediums |
| Amplitude | The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium |
| Wavelength | The distance between two corresponding parts of a wave |
| frequency | The number of complete waves that pass a given point in a certain amount of time |
| Hertz (Hz) | Unit of measurement for frequency |
| Reflection | The boucing back of of a wave when it hits a surface through which it cannot pass |
| Angle of Incidence | The angle between an incoming wave and an imaginary line drawn perpendicular to the surface of the new medium |
| Angle of Reflection | The angle between a reflected wave and an imaginary line drawn perpendicular to the surface of the new medium |
| Refraction | The bending of waves as they enter a different medium |
| Diffraction | The bending of waves around a barrier |
| Interference | The interaction between waves that meet. |
| Constructive Interference | The interference that occurs when two waves combine to make a wave with a larger amplitude |
| Destructive Interference | The interference that occurs wen two waves combine to make a wave with a smaller amplitude |
| Standing Wave | A wave that appears to stand in one place, even though it is really two waves interfering as they pass through each other |
| Node | A point of zero amplitude on a standing wave |
| Antinode | The point of maximum amplitude on a standing wave |
| Resonance | The increase in the amplitude of vibration that occurs when external vibrations match the object's natural frequency |
| Seismic Wave | A wave produced by an earthquake |
| Primary Wave | A longitudal seismic wave |
| Secondary Wave | A transverse seismic wave |
| Tsunami | Surface wave on the ocean caused by an underwater earthquake |
| Seismograph | Instrument used to detect and measure earthquakes |
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