Waves-Princeton AP Physics I

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15 Terms

1
Doppler Effect
When a source of sound waves and a detector are not in relative motion, the frequency that the source emits matches the frequency that the detector receives.
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2
Nodes
always alternate with antinodes, they're equally spaced, and the distance between two successive nodes (or antinodes) is equal to 1 /2λ.
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3
Crests
the maximum vertical displacement above the horizontal
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4
Mechanical wave
disturbance transmitted by a medium form from one point to another, without the medium itself being transported
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5
Crests
maximum vertical displacement above the horizontal
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6
Troughs
maximum vertical displacement below the horizontal
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7
Wavelength
the crests and troughs repeat themselves at regular intervals along the rope, and the distance between two adjacent crests (or two adjacent troughs) is the length of one wave
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8
Amplitude of the wave
maximum displacement from the horizontal equilibrium position of the rope is measurable
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9
period
The time it takes for one complete vertical oscillation of a point on the rope
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10
Frequency
the number of cycles it completes in one seconds, f
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11
Constructive Interference
two waves have a displacement of the same sign when they overlap, and the combined wave will have a displacement of greater magnitude than either individual wave
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12
Destructive Interference
the waves have opposite displacements when they meet, the combined waveform will have a displacement smaller magnitude than either individual wave
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13
standing wave
a wave in which the ratio of its instantaneous amplitude at one point to that at any other point does not vary with time
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14
Compressions
The variations in the conducting medium can be positions at which the molecules of the medium are bunched together (where the pressure is above normal)
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15
Rarefactions
positions where the pressure is below normal
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