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# Chaper 25 Vocabulary

### cdeutsch/ursuline

A 'wiggle' in space and time; a disturbance that repeats regularly in space and time and that is transmitted progressively from one place to the next with no actual transport of matter. wave
refers to the distance from the midpoint from the crest or trough of the wave amplitude
low points on a wave troughs
The time required for a pendulum to make one to-and-fro swing. In general, the time to complete a single cycle. Period
distance from the top of one crest to the top of the next one wavelengths
a repeating back and forth motion about an equilibrium position vibration
An oscillation, or repeating back and forth motion of a pendulum simple harmonic motion
the number of vibrations an object makes in a unit of time. pendulum
The time required for a pendulum to make one to-and-fro swing. In general, the time to complete a single cycle. Period
A curve whose shape represents the crest and troughs of a wave, as traced out by a swing pendulum that drops a trail of sand over a moving conveyer belt. sine curve
One of the places in a wave where the wave is highest or the disturbance is greatest. crest
unit of frequency hertz (Hz)
whenever the motion of the medium is at right angles to the direction in which a wave travels transverse waves
when the particles oscillate parallel to or along the direction of the wave rather than at right angles to it longitudinal wave
is a regular arrangement of places where wave effects or increased decreased or neutralized interference pattern
the crest of one wave overlaps the crest of another and their individual effects add together. The result is a wave of increased amplitude constructive interference
The crest of one wave overlaps the trough of another and their individual effects are reduced. The high part of one wave fills in the low part of another. The waves cancel each other. destructive interference
The crest of one wave overlaps the trough of another to produce regiosn of zero amplitude out of phase
The crest of one wave overlaps the crest of another wave and the troughs overlap. in phase
is a wave that appears to stay in one place; it does not seem to move through the medium standing wave
the stationary points on a standing wave nodes
the position on a standing wave with the largest amplitude anti-nodes
this apparent change in frequency due to the motion of the source or receiver the Doppler effect
an increase in frequency; the increase is toward the high frequency of the spectrum blue shift
a decrease in frequency referring to the low frequency or end of the color spectrum red shift
the crest overlap at the edges and the pattern made by these overlapping crests is a V-shape bow wave
is a three dimensional wave that consists of overlapping spears that form a cone shock wave
the sharp crack heard when the shock wave sweeps behind a supersonic aircraft that reaches the listeners sonic boom
Created by: cdeutsch

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