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- Waves result from an energy source
- displacing sections of a medium.Although
- the wave is said to move through the
- medium, the individual parts of the medium
- in an ideal wave return to their original
- state and position after the wave has passed.
- Transverse motion occurs when the
- motion of the parts of the medium is in a
- direction perpendicular to the direction in
- which the wave is traveling. In this case, the
- wave is said to propagate in a direction
- perpendicular to the motion of the medium.
- If the motion of the parts of the medium
- is in the same direction as wave propagation,
- the wave has longitudinal motion. Light is an
- example of a transverse wave traveling in an
- electromagnetic medium; sound is an example of
- a longitudinal wave traveling in an elastic
- medium. Since they propagate in a given
- direction, these waves are also known as traveling waves.
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