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34 Cards in this Set
- Front
- Back
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mechanical waves |
disturbance in matter that carries energy from one place to another |
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Medium |
material through which a wave travel |
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transverse waves |
wave that causes a medium to vibrate at RIGHT ANGLES |
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crest |
HIGHEST POINT of the wave above the rest position |
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Trough |
LOWEST POINT below the rest position |
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longitudinal wave |
wave in which vibration of the medium is PARALLEL |
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Compression |
An area where the particles in a medium are spaced CLOSE TOGETHER |
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rarefaction |
An area where the particles in a medium are SPREAD OUT |
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Surface wave |
wave travels along a surface separating two media |
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periodic motion |
motion that repeats at regular time intervals |
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period |
complete motion that returns to its starting point |
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frequency |
number of COMPLETE CYCLES in a given time |
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Wavelength |
distance between a point on one wave and the same point on the next cycle of the wave |
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Is the wavelength directly or inversely proportional to the frequency? |
INVERSELY PROPORTIONAL |
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amplitude |
maximum displacement from its medium from its rest position |
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Reflection |
wave BOUNCES OFF a surface that it cannot pass through |
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Refraction |
BENDING OF A WAVE as it enters a new medium at an angle |
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Diffraction |
BENDING OF A WAVE AS IT MOVES AN OBSTACLE or passes through a narrow opening |
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Wavelength is LARGE |
A wave diffracts more if its ______ compared to the size of an opening or obstacle |
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Interference |
two or more waves OVERLAP and combine together |
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Constructive Interference |
two or more waves combine to produce a wave with a LARGER DISPLACEMENTS |
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Destructive Interference |
two or more waves combine to produce a wave with a SMALLER DISPLACEMENT |
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Standing wave |
wave that appears to stay in one place |
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node |
a standing wave that has NO DISPLACEMENT from the rest position |
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antinode |
crest or trough occurs midway between two nodes |
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Intensity |
rate at which a wave ‘s energy flows through a given area |
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Decibel |
unit that compares the intensity of different sounds |
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Loudness |
physical response to the intensity of sound |
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pitch |
frequency of a sound as you perceive it |
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Ultrasound |
sound at frequencies higher than most people hear |
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SONAR |
Determining the distance to an object underwater |
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Doppler effect |
change in sound frequency caused by motion of the sound source, motion of the listener or both |
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resonant frequencies |
waves that will naturally resonate ub the pipes |
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fundamental |
lowest note you can play |
