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28 Cards in this Set
- Front
- Back
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wavelength |
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave |
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frequency (units of hertz) |
the number of crests of a wave that move past a given point in a given unit of time |
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period |
the time needed for one complete cycle of vibration to pass a given point |
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crest |
the point on a wave with the maximum value or upward displacement within a cycle |
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trough |
the minimum or lowest point in a cycle |
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equilibrium position |
a condition in which all influences acting cancel each other, so that a static or balanced situation results |
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amplitude |
the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position |
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medium |
a substance that makes possible the transfer of energy from one location to another, especially through waves |
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pitch |
how high or low a note a being played by a musical instrument or sung seems to be |
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volume |
the loudness of a sound |
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timbre/tone |
sound of distinct pitch, quality, and duration; a note |
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mechanical wave |
a wave that is an oscillation of matter, and therefore transfers energy through a medium |
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longitudinal wave |
a wave vibrating in the direction of propagation |
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transverse wave |
a wave vibrating at right angles to the direction of its propagation |
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pressure wave |
a wave in which the propagated disturbance is a variation of pressure in a material medium |
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compression |
a region in a longitudinal wave where the particles are closest together |
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refraction |
the bending of a wave, such as a light or sound wave, as it passes from one medium to another medium of different density |
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incident wave |
the ability of the driving device to provide a voltage step of sufficient amplitude across the entire backplane that it can be recognized by the receivers as a valid change in state |
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reflected wave |
the wave is incident on the surface equals the angle at which it is reflected |
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transmitted wave |
the moving of electromagnetic waves (whether visible light, radio waves, ultraviolet, etc.) through a material |
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less dense medium |
a less dense medium |
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destructive interference |
the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other |
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constructive interference |
the interference of two or more waves of equal frequency and phase, resulting in their mutual reinforcement and producing a single amplitude equal to the sum of the amplitudes of the individual waves |
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standing wave |
a vibration of a system in which some particular points remain fixed while others between them vibrate with the maximum amplitude |
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beats |
the sum of two sine waves |
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resonance |
a phenomenon that consists of a given system being driven by another vibrating system or by external forces to oscillate with greater amplitude at some preferential frequencies |
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the doppler effect |
an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other |
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wave speed |
the speed at which a wave travels |
