Question

what is the difference between compression and rarefraction....?? ​

Answer 1

❋ 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.

Answer 2

$\Large{\underline{\underline{\bf{Solution :}}}}$

★ Longitudinal Waves :

A wave in which the particle of the medium oscillate (vibrate) to and fro about their mean position in the direction of propagation of the wave is called a longitudinal wave.

Longitudinal waves can be produced in any medium, viz., in solids, liquids and in gases.

→ Example :

(i) Sound waves are longitudinal waves.

(ii) The waves produced in a spring (slinky) by compressing a small portion of it and releasing are longitudinal waves.

Compression : The part of a longitudinal wave in which the density of the particles of the medium is higher than the normal density is called a compression.

Rarefaction : The part of a longitudinal wave in which the density of the particles of the medium is lesser than the normal density is called a rarefaction.

__________________________

★ Graphical Representation : Refer to the Attachment.