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Mech. Waves/Sound

17.3 and 17.4

reflection occurs when a wave bounces off a surface that it cannot pass through
refraction the bending of a wave as it enters a new medium at an angle
diffraction the bending of a wave as it moves around an obstacle or passes through a narrow opening
interference occurs when two or more waves overlap and combine together
constructive interference occurs when two or more waves combine to produce a wave with a larger displacement
destructive interference occurs when two or more waves combine to produce a wave with a smaller displacements
standing wave a wave that appears to stay in one place-it does not seem to move through the medium
node a point on a standing wave that has no displacement from the rest position
antinode a point where a crest or trough occurs midway between two nodes
sound waves longitudinal waves-compressions and rarefactions that travel through a medium
intensity the rate at which a wave's energy flows through a given area
decibel unit that compares the intensity of different sounds
loudness a physical response to the intensity of sound, modified by physical factors
pitch the frequency of a sound as you perceive it
sonar a technique for determining the distance to an object under water
doppler effect a change in sound frequency caused by motion of the sound source, motion of the listener, or both
resonance response of a standing wave to another wave of the same frequency
Created by: mgorcz
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