| A | B |
|---|
| Wave | A traveling disturbance that carries energy from one place to another. |
| Vibration | Movement that follows one path repeatedly. |
| Medium | Matter, or substance, through which a wave is transmitted. |
| Mechanical Waves | Require a medium |
| Electromagnetic Waves | Waves that do not require a medium. |
| Crest | Wave peak. |
| Trough | Low point of a wave. |
| amplitude | Maxium movement from rest. |
| Wavelength | Distance from crest to crest. |
| Lambda | Greek letter for wavelength. |
| Frequency | Number of complete waves, or cycles, per unit time. |
| Speed = Frequency X Lambda | Formula for speed of waves. |
| Hertz | Unit of measurement for frequency. |
| 1 Hz = | 1 wave/sec. |
| Transverse wave. | Motion of medium is at right angles to the direction of the wave. |
| Longitudinal wave. | Motion of the medium is parallel to the direction of the wave. |
| Light | An example of a transverse wave. |
| Sound | An example of a longitudinal wave. |
| Compression | Particles crowd together. |
| Rarefaction | Particles spread out. |
| Surface wave. | Wave that occurs at the surface of two different mediums. |
| Law of Reflection | The angle of incidence (i) is equal to the angle of reflection (r). |
| Refraction | Bending of waves due to change in speed. |
| Diffraction | Bendingof waves around the edge of an obstacle. |
| Interference | When two or more waves arrive at the same place at the same time. |
