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PS Chapter 17:Waves

PS Chapter 17: Waves and Period Motion Coach Leach

TermDefinition
periodic motion Motion that repeats in equal time intervals.
period The time interval for one complete cycle of periodic motion.
amplitude The maximum displacement from the equilibrium position during periodic motion.
simple harmonic motion Periodic motion that is caused by a restoring force that is proportional to the displacement of the system.
damping Reducing the amplitude of periodic motion by applying a force that works against the motion.
resonance An increase in the amplitude of a vibration due to additional wave input.
wave A disruption that carries energy from one location to another.
mechanical wave A wave that carries energy through a physical medium.
crest The highest point of a wave.
trough The lowest point of a wave.
wavelength The distance between two identical points on successive waves.
transverse wave A wave in which the disruptions move perpendicular to the direction of wave travel.
longitudinal wave A wave in which the disruptions are parallel to the direction of wave travel.
compression A region of high density and pressure in a longitudinal wave.
rarefaction A region of lower density and pressure in a longitudinal wave
frequency The number of waves or cycles that occurs per second.
reflection The bouncing of waves off a surface.
refraction A change in wave direction due to a change in a wave's speed as it enters a new medium.
diffraction The bending of waves around an obstacle or through an opening.
interference The combining of waves where they overlap.
standing wave A wave that is moving even though the locations of the crests and troughs appear to be stationary.
Doppler effect The perceived change in the frequency of a wave due to the motion of the wave's source or of the receiver.
Created by: CoachLeach
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