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17.1-17.3,18.1

mechanical?sound waves, and the electromagnetic spectrum

QuestionAnswer
medium the material tht waves travel through
crest the highest point in a wave above the rest posistion
trough the lowest point below the rest posistion
transverse wave wave tht causes the medium to vibrate at right angles in the direction the wave travels
compression area where the particles in the medium are close together
rarefaction area where the particles in the medium are spread out
longitudinal wave wave wher the vibration of ther meduim is parallel to the direction the wave travels
surface wave wave that travels along a surface seperating to media
periodic motion any motion that repeats a regular time interval
period the time required for one cycle,a complete motion that returns to its starting point.
frequency the number of complete cycles in a given time
amplitude the maximum displacement of the medium from its rest position.
hertz wht frequency is measured in
wave length distance between a point on a wave and tht same point on the next cycle
reflection occurs when waves bounce off a surface it cannot pass
refraction bending of a wave as it enters a new medium at an angle
diffraction bending of a wave as it moves through an obstacle
interference when two or more waves overlap and combine together
constructive interference when two or more waves combine together to make a larger displacement
destructive interference when two or more waves combine to produce a wave with a reduced amplitude
standing wave wave that appears to stay in one place
node point on a standing wave with no displacement from the rest posistion
antinode point where crest or trough occurs midway between two nodes
mechanical wave disturbance in matter which carries energy from one place too annonther.
elelctromagnetic waves
Created by: 1205133354
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