Q:

# What kind of waves require a medium through which to travel?

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Mechanical waves require a medium to travel through so that they can transmit energy. Some examples of mechanical waves are water waves, sound waves and the waves of a slinky or jump rope. The medium through which a mechanical wave moves through can be a fluid, solid or gas.

## Keep Learning

Mechanical waves can be either longitudinal or transverse waves. While a longitudinal wave is a wave in which the medium's displacement is parallel to the direction of the wave's propagation, a transverse wave is a wave that vibrates in a perpendicular at a right angle direction to the direction of the wave's propagation. An example of a longitudinal wave is a sound wave moving through air. A string wave is an example of a transverse wave.

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## Related Questions

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Sound occurs as a result of the back-and-forth vibration of sound waves travelling across a medium. A sound wave is sometimes referred to as a pressure wave because it contains repeating patterns of high-pressure and low-pressure regions.

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• A:

Pitch, in physics, is equivalent to the frequency of sound waves, which are any compression waves in a medium. The word "pitch" is used specifically in situations where humans are perceiving the frequency of sound and changes in that frequency. Differences and changes in perceived pitch aren't always the same as the actual differences and changes in the frequencies of the sounds perceived.

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All types of waves, including sound waves, can be refracted when they interact with a medium or move from one medium to another. One example of refraction of sound is when the sound of thunder is refracted upwards because of a change in air temperature, from cold to warm.