 | Term | Definition |
| |
Sine Curve |
the waveform traced by simple harmonic motion which an be made visible on a moving conveyor belt by a pendulum swinging at right angles above the moving belt |
| |
Amplitude |
For a wave or vibration, the maximum displacement on either side of the equilibrium (midpoint)position |
| |
Wavelength |
The distance between successive crests, troughs, or identical parts of a wave |
| |
Frequency |
for a vibrating body or medium, the number of vibrations per unit time. For a wave the number of crests that pass a particular point per unit time |
| |
Hertz |
The SI unit of frequency- one equals one vibration per second |
| |
Period |
The time in which a vibration is completed. equals 1/frequency, period of wave= period of source |
| |
Wave speed |
The speed with which waves pass a particular point (WS= wavelengthXfrequency) |
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Transverse Wave |
a wave in which the medium vibrates in a derection perpendicular to the direction in which the wave travels (light waves and water waves) |
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Longitudinal Wave |
A wave in which the medium vibrates in a derection parallel to the direction in which the wave travels (sound waves) |
| |
Interference pattern |
The pattern formed by superposition of different sets of waves that produces reinforcement in some places and cancellation in others |
| |
Standing Wave |
A stationary wave pattern formed in a medium when two sets of identical waves pass through the medium in opposite directions |
| |
Doppler Effect |
The shift in received frequency due to motion of a vebtating source toward or away from a reciever |
| |
Bow Wave |
The V- shaped disturbance created by an object moving across a liquid surface at a speed greater than the wave speed |
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Shock Wave |
THe cone-shaped disturbance created by an object moving a supersonic speed through a fluid |
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Sonic Boom |
The loud sound resulting from the incidence of a shock wave ( only hear one when the Shock Wave passes the listener) |
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vibration |
wiggle in time; source of all waves |
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Wave |
wiggle in both space and time |
| |
the time it takes a pendulum to swing back and forth depends on...(2 things) |
the length and the acceleration due to gravity (g) |
| |
oscillatory motion |
to and fro vibratory motion |
| |
crests |
a wave's high points |
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Troughs |
a wave's low points |
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relationship between period and frequency? |
They are inverse of each other (F=1/P and P=1/f) |
| |
wave motion |
transfer of energy without transfer of matter |
| |
compression |
longitudinal wave's crest |
| |
rarefraction |
Longitudinal wave's trough |
| |
constructive interference |
Crests match crests= reinforcement |
| |
Destructive interference |
Crests match troughs= cancellation |
| |
nodes |
regions of minimal or zero displacement with zero or minimal energy |
| |
anti-nodes |
regions of maximum displacement and maximum energy |
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