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Jeremy Struckel
Chpt. 17 Vocab.
| Term | Definition |
|---|---|
| Mechanical Wave | A disturbance in matter that carries energy from one place to another. |
| Medium | The material trough which a wave travels. |
| Crest | The highest point of the wave above the rest position. |
| Trough | The lowest point below the rest position. |
| Transverse Wave | A wave that causes a medium to vibrate at right angles to the direction in which the wave travels. |
| Compression | An area where the particles in a medium are spaced close together. |
| Rarefaction | An are where the particles in a medium are spread out from each other. |
| Longitudinal Wave | A wave in which the vibration of the medium is parallel to the direction the wave travels. |
| Surface Wave | A wave that travels along a surface separating two media. |
| Periodic Motion | Motion that recurs over and over and the period of time required for each recurrence remains the same |
| Period | An amount of time |
| Frequency | The number of occurrences within a given time period |
| Hertz | The unit of frequency |
| Wavelength | The distance between corresponding points on adjacent waves |
| Amplitude | The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium |
| Reflection | The action of a wave bouncing off an object |
| Refraction | The bending of a wave caused by a change in its speed as it moves from one medium to another |
| Diffraction | The bending of waves around a barrier or through an opening |
| Interference | A wave interaction that occurs when two or more waves overlap |
| Constructive Interference | The interference that occurs when two waves combine to make a wave with a larger amplitude |
| Destructive Interference | The interference that occurs when two waves combine to make a wave with a smaller amplitude |
| Node | A point on a standing wave that has no displacement from the rest position. |
| Intensity | The amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude |
| Electrogmagnetic Waves | Transverse waves consisting of changing electric fields and changing magnetic fields. |
| Electric Field | A region of space exerts electric forces on charged particles. |
| Magnetic Field | A region of space produces magnetic forces. |
| Electromagnetic Radiation | The transfer of energy by electromagnetic waves traveling though matter or across space. |
| Photoelectric Effect | The emission of electrons from metal caused by light striking the metal. |
| Photons | Packets of electromagnetic energy. |
| Intensity | The rate at which a wave's energy flows through a given unit of area. |
| Electromagnetic Spectrum | The full range of frequencies of electromagnetic radiation. |
| Amplitude Modulation | When the amplitude of a wave is varied, and the frequency remains the same. |
| Frequency Modulation | When the frequency of a wave is varied, and the amplitude remains the same. |
| Thermograms | Color-coded pictures that show variations of the temperature. |
| Antinode | A point where a crest or trough occurs midway between two nodes. |
Created by:
JeremyStruckel
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