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Waves
Wave Types, Properties, & Interactions
32
Science
8th Grade
01/03/2007

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Term
Amplitude
Definition
The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium.
Term
Amplitude
Definition
Also called the "height" of a wave.
Term
Amplitude
Definition
Measured from the resting position to the crest or from the resting position to the trough.
Term
Antinode
Definition
A point of maximum amplitude on a standing wave.
Term
Compression
Definition
The part of a longitudinal wave where the particles of the medium are close together.
Term
Compression
Definition
The part of a longitudinal wave that would be the same as the crest of a transverse wave.
Term
Constructive Interference
Definition
The interference that occurs when waves combine to make a wave with a larger amplitude.
Term
Crest
Definition
The highest part of a transverse wave.
Term
Crest
Definition
The part of a transverse wave that would be the same as the compression of a longitudinal wave.
Term
Destructive Interference
Definition
The interference that occurs when two waves combine to make a wave with a smaller amplitude.
Term
Diffraction
Definition
The bending of waves as they move around a barrier or pass through an opening in a barrier.
Term
Frequency
Definition
The number of complete waves that pass a given point in a certain amount of time.
Term
Frequency
Definition
Is measured in the unit "hertz" (Hz).
Term
Hertz
Definition
The unit of measurement for frequency.
Term
Law of Reflection
Definition
The rule that states that the angle of reflection of a wave is equal to the angle of incidence.
Term
Longitudinal Wave
Definition
A wave that moves the particles of a medium in a direction parallel to the direction in which the wave travels.
Term
Mechanical Wave
Definition
A wave that requires a medium through which to travel.
Term
Mechanical Wave
Definition
The type of wave that can be transverse or longitudinal.
Term
Medium
Definition
The material through which a wave travels.
Term
Node
Definition
A point of zero amplitude on a standing wave.
Term
Rarefaction
Definition
The part of a longitudinal wave where particles of the medium are far apart.
Term
Rarefaction
Definition
The part of a longitudinal wave that would be the same as the trough of a transverse wave.
Term
Reflection
Definition
The bouncing back of an object or wave when it hits a surface through which it cannot pass.
Term
Refraction
Definition
The bending of waves as they enter a new medium at an angle.
Term
Standing Wave
Definition
A wave that appears to stand in one place, even though it is really two waves interfering as they pass each other.
Term
Transverse Wave
Definition
A wave that moves the medium in a direction perpendicular to the direction in which the wave travels.
Term
Trough
Definition
The lowest part of a transverse wave.
Term
Trough
Definition
The part of a transverse wave that would be the same as the rarefaction in a longitudinal wave.
Term
Wave
Definition
A disturbance that transfers energy from place to place.
Term
Wavelength
Definition
The distance between two corresponding parts of a wave.
Term
Wavelength
Definition
The distance between to consecutive crests.
Term
Wavelength
Definition
The distance between to consecutive troughs.
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