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PS - Waves (Ch.15)

Physical Science - Introduction to waves - Ch. 15 - PH Science Explorer

TermDefinition
wave a disturbance that transfers energy from place to place
energy the ability to do work or cause change
medium the material through which a wave travels
mechanical wave a wave that requires a medium through which to travel
vibration a repeated back-and-forth or up-and-down motion
transverse wave a wave that moves the medium in a direction perpindicular to the direction in which the waves travel
crest the highest part of a transverse wave
trough the lowest part of a transverse wave
longitudinal wave a wave that moves a medium in a direction parallel to the direction in which the waves travel
compression the part of a longitudinal wave where the particles of the medium are close together
rarefaction the part of a longitudinal wave where the particles of a medium are far apart
amplitude the maximum distance the partcles of a medium move away from thier rest position as a wave passes through the medium
wavelength the distance between two corresponding parts of a wave
frequency the number of complete waves that pass a given point in a certain amount of time
hertz (Hz) unit of measurement for frequency
reflection the bouncing back of an object or wave when it hits a surface through which it cannot pass
law of reflection the rule that the angle of reflection equals the angle of incidence
refraction the bending of waves as they enter a new medium at an angle
diffraction the bending of waves as they move around a barrier or pass through an opening
interference the interaction of waves that meet
constructive interference the interference that occurs when waves combine to make a wave with a larger amplitude
destructive interference the interference that occurs when two waves combine to make a wave with a smaller amplitude
standing wave a wave that appears to stand in one place even though it is really two waves interfering as they pass through each other
node a point of zero amplitude on a standing wave
antinode a point of maximum amplitude on a standing wave
resonance the increase in the amplitude of a vibration that occurs when external vibrations match an object's natural frequency
seismic wave a wave produced by an earthquake
P wave a longitudinal seismic wave
S wave a transverse seismic wave
surface wave a combination of a longitudinal wave and a transverse wave that travels along the surface of a medium
tsunami a huge surface wave on the ocean caused by an underwater earthquake
seismograph an instrument used to detect and measure earthquake waves
Created by: mwhite5 on 2014-01-13



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