22 terms

# Waves and Vibrations

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Crest
the high point of a wave
Trough
the lowest part of a wave
Amplitude
(physics) the maximum displacement of a periodic wave
Wavelength
the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave
Frequency
the number of occurrences within a given time period (usually 1 second)
Hertz
the unit of frequency
Transverse Wave
a wave that moves the medium in a direction perpendicular to the direction in which the wave travels
Longitudinal Wave
A wave in which the vibration is in the same direction as that in which the wave is traveling
Interference Pattern
A pattern formed by the overlapping of two or more waves that arrive in a region at the same time.
Constructive Interference
the interference that occurs when two waves combine to make a wave with a larger amplitude
Destructive Interference
Addition of two waves when the crest of one overlaps the trough of another, so that their individual effects cancel each other.
Out of Phase
The crests of one wave overlap the troughs of another to produce regions of zero amplitude
In Phase
when the peaks and troughs of a pair of waves occur at the same time and in the same location
Standing Wave
a wave pattern that results when two waves of the same frequency, wavelength, and amplitude travel in opposite directions and interfere
Node
Point of minimum displacement in a standing wave.
Anti-node
Point of maximum displacement in a standing wave.
Doppler Effect
change in the apparent frequency of a wave as observer and source move toward or away from each other
Blue Shift
motion induced shift in light wavelength due to objects moving closer to the observer
Red Shift
the change in the wavelength of light due to an object moving away from the observer.
Bow Wave
The V-shaped wave produced by an object moving on a liquid surface faster than the wave speed.
Shock Wave
The cone-shaped disturbance created by an object moving at supersonic speed.
Sonic Boom
an explosive sound caused by the shock wave of an something traveling faster than the speed of sound