Rarefaction is a region in a longitudinal wave where the particles are furthest apart. Figure 2 - A simple sine wave, shown as a transverse waveĬompression happens in the region in a longitudinal wave where the particles are closest together. Think of the way a slinky behaves if two people are holding each end and one person quickly sends a number of vibrations down it. In contrast, longitudinal waves have vibrations along the same axis as the direction in which the wave is traveling. Transverse waves vibrate at 90 degrees to the direction of the wave. Throughout most of his incarnations, he is an underlying loyal lieutenant of the Decepticon leader Megatron. Both light waves and sound waves have some common traits, such as. The energy is carried in the form of a wave. His most well-known disguise is that of a micro cassette recorder. Sound, just like light, is a kind of energy. In a solid, there simultaneously exist two types of elastic waves. Most waves are transverse, including light and the ripples we see on water. Soundwave is a fictional character appearing in various Transformers continuities within the Transformers franchise. There are types of ultrasonic waves, longitudinal wave, transverse wave and surface wave, etc. Sound waves are longitudinal and should not be confused with transverse waves. Figure 1 - Longitudinal sound wave showing compression (squeezing-high pressure) and rarefaction (spreading-low pressure) of air particles Each individual molecule only moves a small distance as it vibrates, which causes the adjacent molecules to vibrate in a rippling effect all the way to the ear. It's the vibrating air molecules that cause the human eardrum to vibrate, which the brain then interprets as sound.Īir molecules do not travel from the noise source to the ear. air, as it propagates away from its source.Īs sound passes through the air, the air particles move left and right due to the energy of the sound wave passing through it. A sound wave is a pressure vibration caused by the movement of energy traveling through a medium e.g.
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