sound waves cause air particles to vibrate back and forth; ripples cause water particles to vibrate up and down. A longitudinal wave is one in which the vibrations of the particles are parallel to ...
Wavelength is the distance covered by a full cycle of the wave, usually measured from peak to peak, or trough to trough. The distance between 2 peaks is 8 m. The wavelength of the wave is 8 m.
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