Compression waves are also called longitudinal waves. Longitudinal waves are mechanical waves in which the vibration of the particles takes place in the same direction as that of the wave.In a stretched spring, a longitudinal wave can be created by compressing a small region of the coils and then releasing the compressed region. As a result, the disturbance will propagate as a longitudinal pulse. Show In a longitudinal wave, compression is a region where the medium is compressed, and rarefaction is a region where the medium is spread out. Examples of compression waves include sound waves, ultrasound waves, and seismic P-waves.
In compression waves, the vibration of the medium is parallel to the direction the wave travels and the displacement of the medium is in the same (or opposite) direction of the wave propagation. The amplitude of a compressional wave is proportional to how tightly the medium is compressed at the compression. The larger the amplitude of the wave and the more energy it carries, the denser the medium is at the compression. The closer the coils are together in compression, the further apart they are in rarefaction.A vacuum cannot support any wave that requires compression/rarefaction (such as sound) or shear between matter atoms or molecules, or a combination of these. These types of waves are known as longitudinal or transverse waves. Sound waves are compression waves.
A compression wave (such as a sound wave) is propagated by the elastic compression of the medium. — called also compression wave. Examples Of Compression Waves In Everyday Life
In a longitudinal wave, compression is the region when the particles are closest together. A rarefaction is an area in a longitudinal wave where the particles are the furthest distant from one another. More Interesting TopicsA wave that consists of a vibration or any periodic disturbance which happens in the same direction like the advance of the wave. When you compress one end of the coiled spring and release it, it experiences a wave of compression which travels to the length of it, stretching follows it. The coil of the spring has a point that moves with the wave and returns from the same path, while returning it passes from the neutral position and then again reverses its motion. Moving of the sound through air results in compressing the gas in the direction where sound waves are travelling while they vibrate back and forth. The seismic waves which are primary p, are also longitudinal. All the particles in the longitudinal wave, vibrates to its rest position which is normal and with the axis of propagation, and all the particles that participate in the wave motion behaves in the same way, except in phase of vibration, there is a case of progressive change that means every particle finishes its cycle of reaction at a time that is later. With the combined motions, it results in moving forward in the alternating region of compression and rarefaction towards the propagation’s direction. The pattern of disturbances is of two types or in other words the formation of waves is done in two different methods. We know that the energy of the particles in motion is transmitted in the form of waves. Depending on the type of motion two forms of waves are classified, the first one is a longitudinal wave and the second is a Transverse wave. The longitudinal motion or the longitudinal wave are found when the energy has to be transmitted within the medium. Whereas the transverse waves are formed at the surface. Terms Used in Longitudinal Waves
Examples of Longitudinal WavesThe longitudinal waves are mechanical waves and these are readily used in nature for transmitting energy from one point to another within the medium. There are several examples of longitudinal waves. Sound waves are the most common example of longitudinal waves, pressure waves, spring waves, etc… Let’s have a look at these examples in detail to understand the concept of longitudinal waves. The best example of longitudinal waves is the sound wave, in order to receive the sound wave we definitely require a medium which is generally an air medium. This is the main reason why the sound waves can not propagate in a vacuum. In this article, we will discuss what are longitudinal waves, examples of longitudinal waves, formation of longitudinal waves, etc… 1. Sound Waves in the Air:Yes, the sound waves are longitudinal in nature. When we speak, the sound wave propagates through the air medium and reaches the audience. The sound waves are the best example of a longitudinal wave and are produced by vibrating or disturbing the motion of the particles that travel through a conductive medium. An example of sound waves in a longitudinal direction of propagation is the tuning fork. In sound waves, the amplitude of the wave is always the difference between the maximum pressure caused by the wave and the pressure of the undisturbed air. The propagation speed of sound depends upon the type, composition of the medium, and temperature through which it will propagate. 2. The Primary Waves of an Earthquake:It is said that animals can sense earthquake waves much before humans. They have the ability to sense the seismic P waves, which travel only in the interior of the earth. Even humans can experience a little bump and rattle of these waves, but they are mostly unnoticeable to us. The P waves are the fastest waves, and they require a medium to travel either solid or liquid. The P waves cause the interior of the earth i.e., tectonic plates to move back and forth (in other words to oscillate) in a longitudinal manner, which leads to the surface waves i.e., seismic S waves, which we can feel. 3. The Vibration in a Spring:Consider a small spring, suppose we knock the end of the spring, the waves that formed will flow through the spring. The waves formed will propagate within the spring and hence they are considered to be the longitudinal waves. At the same time, if one end of the spring is fixed, the waves will propagate in the up and down direction resulting in transverse waves. (Image will be Uploaded soon) 4. The Tsunami Waves:We know that tsunamis are dangerous natural disasters that may lead to severe loss to human beings. Tsunamis cause damage to coastal regions (sea shore) and that’s the reason why people residing in coastal regions are afraid of them. Most people think that sea waves are transverse waves as they keep travelling in to and fro motion i.e., they go up and down continuously. However, water or sea waves, including Tsunami, are an example of both transverse as well as a longitudinal wave. When the waves reach the shore or remote areas, they become comparatively smaller and thinner, and water molecules move parallel to the wave, hence making it a longitudinal wave. Transverse and Longitudinal Waves:Let us understand what are transverse and longitudinal waves with the following list of differences. Both the longitudinal and transverse play an important role in elaborating the concept of sound. Thus the major difference between the transverse wave and longitudinal wave are as follows:
Did You Know:Dogs are sensitive to sound at a higher frequency than humans, allowing them to hear noises that humans can not. Sound waves are used by many animals to detect danger, warning them of possible attacks before they happen. Sound can not travel through a vacuum (an area empty of matter), it requires a medium. The speed of sound is around 767 miles per hour. The loud noise you create by cracking a whip occurs because the tip is moving with a high frequency and speed it breaks the speed of sound. |