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Polarization
Mechanical stresses
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Polarization
By reflection
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Pulse
Similar frequencies
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Doppler
Changing frequencies
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Waves
In the water
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Stationary
Troughs and crests
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Sound energy
Tuning fork
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Alleviation
Undulating
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Interference
With white light
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Atmosferic
Dispersion
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Ultraviolet
Hidden message
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Stationary
In tubes