What is compression and rarefaction Class 9?

What is compression and rarefaction Class 9?

Rarefraction: A rarefaction is defined as the region in a longitudinal wave where the particles are apart from each other. Compression: A compression is defined as the region in a longitudinal wave where the particles are cloest together.

What is a rarefaction in waves?

Rarefactions are areas of ultrasound wave having low pressure as the distance of their particles is far while compressions are areas having high pressure as the distance of their particles is close.

What is a compression wave definition?

1 Acoustic propagation wave theory. Longitudinal or compression waves are defined as waves where the particle motion is in the same direction in which the wave is propagating. The oscillations in pressure are sinusoidal in nature and are characterised by their frequency, amplitude and wavelength (Figure 9.1).

What is compression in physics class 9?

When a vibrating object moves forward in air as medium, it pushes and compresses the air in front of it. creating a region of high pressure. This region is called a compression.

What is compression and rarefaction in a longitudinal wave?

Longitudinal waves show areas of compression and rarefaction : compressions are regions of high pressure due to particles being close together. rarefactions are regions of low pressure due to particles being spread further apart.

What is rarefaction in science definition?

rarefaction, in the physics of sound, segment of one cycle of a longitudinal wave during its travel or motion, the other segment being compression. A succession of rarefactions and compressions makes up the longitudinal wave motion that emanates from an acoustic source.

What is rarefaction Class 9?

When a vibrating object moves backward in air as medium, it creates a region of low pressure. This region is called a rarefaction.

Does rarefaction refer to the compression of air molecules?

Rarefaction, in the physics of sound, segment of one cycle of a longitudinal wave during its travel or motion, the other segment being compression . If the prong of a tuning fork vibrates in the air, for example, the layer of air adjacent to the prong undergoes compression when the prong moves so as to squeeze the air molecules together.

What type of wave does rarefaction and compression?

However instead of crests and troughs, longitudinal waves have compressions and rarefactions. A compression is a region in a longitudinal wave where the particles are closest together. A rarefaction is a region in a longitudinal wave where the particles are furthest apart.

What is an example of rarefaction?

An example of rarefaction is also as a phase in a sound wave or phonon. Half of a sound wave is made up of the compression of the medium, and the other half is the decompression or rarefaction of the medium.