How rarfractions and compression helps in propagation of sound?
Sound comes from a series of vibrations, and all the sounds you heard in the experiment occurred because of vibrations and energy. Sound travels in waves. When a source, or something that produces sound, vibrates, it transfers its energy to the surrounding particles causing them to vibrate. Those particles then bump into the ones next to them and so on. This causes the particles to move back and forth but waves of energy to move outward in all directions from the source. Your vocal chords and the strings on a guitar are both sources which vibrate to produce sounds. Without energy, there would be no sound. Let's take a closer look at sound waves.
Role of compressions and Rarefactions in sound wave:
Waves are made up of compressions and rarefractions. Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand. Remember that sound is a type of kinetic energy. As the molecules are pressed together, they pass the kinetic energy to each other. Thus sound energy travels outward from the source. These molecules are part of a medium, which is anything that carries sound. Sound travels through air, water, or even a block of steel, thus, all are mediums for sound. Without a medium there are no molecules to carry the sound waves. In places like space, where there is no atmosphere, there is no sound.
Role of compressions and Rarefactions in sound wave:
Waves are made up of compressions and rarefractions. Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand. Remember that sound is a type of kinetic energy. As the molecules are pressed together, they pass the kinetic energy to each other. Thus sound energy travels outward from the source. These molecules are part of a medium, which is anything that carries sound. Sound travels through air, water, or even a block of steel, thus, all are mediums for sound. Without a medium there are no molecules to carry the sound waves. In places like space, where there is no atmosphere, there is no sound.