Question

Difference between compression and rarefaction
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Answer 1

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When sound wave travels through a medium, say air, the particles of medium disturb in the same fashion, i.e.

compression and rarefaction (depression). When air particles come closer it is called compression. On the other hand,

when particles go farther than their normal position it is called rarefaction.

Answer 2

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❋ Compression :-

➠ It is the portion of the medium in which density increases when longitudinal wave travels.

➠ In the compression there is temporary decrease in volume of the medium and increase in density.

➠ The distance between the particles in the compression is less than the normal distance. The centre of compression is the position of maximum pleasure and maximum density.

❋ Rarefactions :-

➠ It is the position of the medium in which density decreases when longitudinal wave travels.

➠ In the refraction, there is temporary increase in volume of the medium and decrease in density.

➠ The distance between the particles in the rare fraction is greater than the normal distance.

➠ The centre of refraction is a position of minimum temperature and minimum density.

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