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Abbie Bender

chapter 25 vocab

QuestionAnswer
wave 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.
amplitude refers to the distance from the midpoint from the crest or trough of the wave
troughs low points on a wave
Period The time required for a pendulum to make one to-and-fro swing. In general, the time to complete a single cycle.
wavelengths distance from the top of one crest to the top of the next one
vibration a repeating back and forth motion about an equilibrium position
simple harmonic motion An oscillation, or repeating back and forth motion, about equilibrium position.
pendulum The weight attached to a string that is free to move back and forth in a fixed position.
Period The time required for a pendulum to make one to-and-fro swing. In general, the time to complete a single cycle.
sine curve 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.
crest One of the places in a wave where the wave is highest or the disturbance is greatest.
hertz (Hz) unit of frequency
transverse waves whenever the motion of the medium is at right angles to the direction in which a wave travels
longitudinal wave when the particles oscillate parallel to or along the direction of the wave rather than at right angles to it
interference pattern is a regular arrangement of places where wave effects or increased decreased or neutralized
constructive interference the crest of one wave overlaps the crest of another and their individual effects add together. The result is a wave of increased amplitude
destructive 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.
out of phase The crest of one wave overlaps the trough of another to produce regiosn of zero amplitude
in phase The crest of one wave overlaps the crest of another wave and the troughs overlap.
standing wave is a wave that appears to stay in one place; it does not seem to move through the medium
nodes the stationary points on a standing wave
anti-nodes the position on a standing wave with the largest amplitude
the Doppler effect this apparent change in frequency due to the motion of the source or receiver
blue shift an increase in frequency; the increase is toward the high frequency of the spectrum
red shift a decrease in frequency referring to the low frequency or end of the color spectrum
bow wave the crest overlap at the edges and the pattern made by these overlapping crests is a V-shape
shock wave is a three dimensional wave that consists of overlapping spears that form a cone
sonic boom the sharp crack heard when the shock wave sweeps behind a supersonic aircraft that reaches the listeners
Created by: abbiebender
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