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32 Cards in this Set
- Front
- Back
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Vibration
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A wiggle in time.
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Wave
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A wiggle in space and time.
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Period
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The time of a back and forth swing or a simple period of time from the beginning of something to the end.
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Simple Harmonic Motion
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The back and forth vibratory motion of a swinging pendulum.
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Sine Curve
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Pectorial representation of a wave.
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Crest
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High point of a wave.
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Trough
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Low point of a wave.
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Amplitude
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The distance from the mid-point to the crest (or tough) of a wave.
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Wavelength
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The distance from the top of one crest to the top of the next one.
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Frequency
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How frequently a vibration occurs.
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Hertz
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Unit of frequency.
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What is the source of all waves?
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Something that vibrates.
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If the frequency is 2 Hz, how much time is needed to complete one vibration? 3 Hz?
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1/2 second, 1/3 second.
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Sound
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Energy that travels to our ears in the form of one kind of wave.
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T/F - It is the disturbance that moves along the length of the string, not the parts of the string itself.
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True
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What determines the speed of a wave?
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The medium through which it moves.
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When is a wave a "transverse" wave?
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Whenever the motion of the medium is at right angles to the direction in which a wave travels.
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Examples of transverse waves?
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In the stretched strings of musical instruments and upon the surfaces of liquids. Electromagnetic radio waves and light are also examples.
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Longitudinal Wave
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The particles move along the direction of the wave rather than at right angles to it.
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Interference Pattern
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Wave effects may be increased, decreased, or neutralized.
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Consructive Interference
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The result of a wave is increased amplitude.
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Destructive Interference
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Cancellation
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T/F - Interference is a characteristic of all sound waves.
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False, it is a characteristic of all wave motion in general.
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Node
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The parts of a rope on a standing wave that remain stationary.
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Anti-Nodes
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The positions on a standing wave with the largest amplitudes are known as antinodes.
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T/F - Standing waves can be produced in transverse and sound waves.
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False, standing waves can be produced in transverse or longitudinal waves.
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Doppler Effect
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The change in frequency due to the motion of the source. The greater the speed of the source, the greater will be the Doppler effect.
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Blue Shift
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An increase in frequency, named so because of the fact that the increase is toward the high-frequency, or blue, end color spectrum.
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Red Shift
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A decrease in frequency.
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Supersonic
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Faster than sound.
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Shock Wave
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A shock wave is produced by overlapping spheres that form a cone.
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Sonic Boom
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When the conical shell of compressed air that sweeps behind a supersonic aircraft reaches listeners on the ground below, the sharp crack they hear is described as a sonic boom.
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