Waves can be classified as either longitudinal or transverse, depending upon the relative direction of medium displacement and wave propagation. If the wave propagation is perpendicular to the direction of medium displacement, the wave can be termed as transverse wave. If the direction of wave propagation is parallel to the direction of medium displacement, such waves can be termed longitudinal waves. Some examples of transverse waves include:
- Waves generated when we move a rope, tied at one end, up and down or sideways.
- light waves
- seismic waves: S waves
- waves generated in a string
- radio waves
- microwaves
- waves generated on the surface of a liquid, when we throw a small particle in it. An example is a wave generated when we throw a stone in a pond.
Some examples of longitudinal waves include sound waves, seismic P-waves, waves in a slinky, etc.
Hope this helps.
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