A transverse wave causes the particles in the medium (the substance that the wave travels through) to vibrate at right angles to the direction of the wave’s motion. A cork in water and the coils of a spring are examples of this. They move up and down as the wave passes.
A longitudinal wave causes the medium’s particles to vibrate in the same direction as the wave’s motion. Examples of longitudinal waves are sound waves and pushing a spring in and out.
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