State four differences between longitudinal and transverse waves. Give an example of each.

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Longitudinal Waves Transverse Waves
$1$. The particles of the medium vibrate parallel to the direction of wave propagation. $1$. The particles of the medium vibrate at right angles to the direction of wave propagation.
$2$. They can travel through solids,liquids,and gases. $2$. They can travel only through solids and on the surfaces of liquids.
$3$. They consist of regions of compressions and rarefactions. $3$. They consist of crests and troughs.
$4$. They cannot be polarized. $4$. They can be polarized.
Example: Sound waves in air. Example: Vibrations in a stretched string.

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