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Noah Vega
Ch. 17 & 18
| Term | Definition |
|---|---|
| periodic motion | any motion that repeats at regular time intervals. |
| period | the time required for one complete cycle of periodic motion. |
| frequency | the number of complete cycles per unit time of periodic motion. |
| hertz | the unit of measure for frequency, equal to one cycle per second. |
| wavelength | the distance between a point on a wave and the same point on the next cycle of the wave. |
| reflection | the interaction that occurs when a wave bounces off a surface it cannot pass through. |
| refraction | the bending of a wave as it enters a new medium at an angle. |
| diffraction | the bending of a wave as it moves around an obstacle or passes through a narrow opening. |
| interference | the interaction of two or more waves that combine in a region of overlap. |
| constructive interference | the interaction among two or more waves in which displacements combine to produce a wave with a larger displacement. |
| destructive interference | the interaction among two or more waves in which displacements combine to produce a wave with smaller displacement. |
| standing wave | a wave that appears to stay in one place and does not seem to move through a medium. |
| node | a point on a standing wave that has no displacement from the rest position. |
| antinode | a point of maximum displacement midway between two nodes in a standing way. |
| electromagnetic waves | a transverse wave consisting of changing electric and changing magnetic fields. |
| electric field | a field in a region of space that exerts electric forces on charged particles; a field produced by electric charges or by changing magnetic fields. |
| magnetic field | a field in a region of space that exerts magnetic forces. |
| electromagnetic radiation | the transfer of energy by electromagnetic waves. |
| photoelectric effect | the emission of electrons from a metal caused by light striking the metal. |
| photons | a packet of electromagnetic energy. |
| intensity | the rate at which a wave's energy flows through given unit of area. |
| electromagnetic spectrum | a full range of electromagnetic radiation. |
| amplitude | the maximum displacement of a medium from the rest position. |
| modulation | ggggggg |
| frequency modulation | a method of transmitting a radio signal in which the frequency of the carrier wave varies while its amplitude remains the same. |
| thermograms | a color coded picture using variation in infrared radiation to show changes in temperature. |
| mechanical wave | a disturbance in matter that carries energy from one place to another |
| medium | the material through which a wave travels |
| crest | |
| trough | |
| transverse wave | |
| compression | |
| rarefaction | |
| longitudinal wave | |
| surface wave |
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noahavega
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