Longitudinal waves are waves where the displacement of the medium is in the same direction as the direction of the travelling wave.
The distance between the centres of two consecutive regions of compression or the rarefaction is defined by wavelength, λ. When the compression and rarefaction regions of two waves coincide with each other, it is known as constructive interference and if the regions of compression and rarefaction do not coincide, it is known as destructive interference.
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longitudinal wave, wave consisting of a periodic disturbance or vibration that takes place in the same direction as the advance of the wave.
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The distance between the centres of two consecutive regions of compression or the rarefaction is defined by wavelength, λ. When the compression and rarefaction regions of two waves coincide with each other, it is known as constructive interference and if the regions of compression and rarefaction do not coincide, it is known as destructive interference.
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