the height of a crest or trough in a transvers wave; or the size of the compression or rarefaction in a longitudinal wave
Antinodes
the point on a transvers wave that corresponds to the crest or trough
Blue shift
An increase in light frequency due to approaching light waves
Bow Wave
as a vibration source travels faster and faster a bow wave occurs at the spot of minimum wave spacing because the previous wave is now meeting the new wave
Constructive interference
waves that meet for an instant and the amplitudes are increased because the waves are in phase
Crest
maximum positive height of a transverse wave or the area of maximum compression in a longitudinal wave
Destructive interference
waves meet for an instant and the amplitudes cancel each other because the waves are ouf of phase
Doppler Effect
percieved change in frequency due to differences in relatice motion of a sound source and an observer
Frequency
number of vibrations per time
Hertz
SI unit for frequency
In Phase
waves that meet crest to crest and trough to trough
Interference pattern
wave pattern observed when two or more vibration meet
Longitudinal wave
wave produced when the disturbance is parallel to the direction that the wave travels
Node
equlibrium position for a wave
Out of phase
waves that meet crest to trough
Period
Time for one cycle of a vibration to occur
Red shift
decrease in light frequency due to a light source that is moving away from an observer
Shock Wave
produced when the speed of the object exceeds the bow wave
Simple Harmonic motion
repetitive motion of vibrating object; the primaty way in which energy is transmitted
Sine Curve
the shape associated with transverse waves
Sonic Boom
occurs when the speed of a source of vibration exceed the shock wave; is a single event
Standing wave
occurs when the natural frequency of an object matches the reflected vibration
Transveres Wave
wave produced by disturbance that is perpendicular to the direction of the wave's travel
Trough
lowest point of a transverse wave, or tthe area of rarefaction of a longitudnal wave