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Wave

travelling wavewavestraveling wave
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.
The types of waves most commonly studied in physics are mechanical and electromagnetic.

Acoustics

acousticacousticianacoustical
Acoustics is the branch of physics that deals with the study of all mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.

Underwater acoustics

underwater soundunderwater acousticacoustic
Underwater acoustics is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries.

Matter

corporealsubstancematerial
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

Transmission medium

mediumtransmission mediamedia
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

Electromagnetic radiation

electromagnetic waveelectromagnetic waveselectromagnetic
In contrast, electromagnetic waves require no medium, but can still travel through one.

Wavelength

wavelengthswave lengthsubwavelength
One important property of mechanical waves is that their amplitudes are measured in an unusual way, displacement divided by (reduced) wavelength.

Nonlinear system

nonlinearnon-linearnonlinear dynamics
When this gets comparable to unity, significant nonlinear effects such as harmonic generation may occur, and, if large enough, may result in chaotic effects.

Harmonic

harmonicsflageoletharmonic frequencies
When this gets comparable to unity, significant nonlinear effects such as harmonic generation may occur, and, if large enough, may result in chaotic effects.

Transverse wave

transversetransverse wavesshear waves
There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves.

Longitudinal wave

longitudinalcompressional wavecompression wave
There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves.

Surface wave

ground wavegroundwavesurface waves
There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves.

Slinky

slinkiesEveryone Loves a SlinkySlinki
To see an example, move an end of a Slinky (whose other end is fixed) to the left-and-right of the Slinky, as opposed to to-and-fro.

Light

visible lightvisiblelight source
Light also has properties of a transverse wave, although it is an electromagnetic wave.

Sound

audiosound wavesound waves
Sound is a longitudinal wave.

Interface (matter)

interfaceinterfacessurface
This type of wave travels along the surface or interface between two media.

Rayleigh wave

Rayleigh wavesRayleighRayleigh surface waves
There are two types of surface waves, namely Rayleigh waves and Love waves.

Love wave

Love wavesLoveQ waves
There are two types of surface waves, namely Rayleigh waves and Love waves.

Earthquake

earthquakesseismic activityseismic
Rayleigh waves have energy losses only in two dimensions and are hence more destructive in earthquakes than conventional bulk waves, such as P-waves and S-waves, which lose energy in all three directions.

P-wave

pressure waveP-wavesP
Rayleigh waves have energy losses only in two dimensions and are hence more destructive in earthquakes than conventional bulk waves, such as P-waves and S-waves, which lose energy in all three directions.

S-wave

shear waveS-wavesshear
Rayleigh waves have energy losses only in two dimensions and are hence more destructive in earthquakes than conventional bulk waves, such as P-waves and S-waves, which lose energy in all three directions.

Seismic wave

seismic wavesseismic velocitybody wave
Some of the most common examples of mechanical waves are water waves, sound waves, and seismic waves.

Ultrasound

ultrasonicultrasonicsultrasounds

Wave equation

spherical waveD'Alembert equationwave
The wave equation is an important second-order linear partial differential equation for the description of waves—as they occur in classical physics—such as mechanical waves (e.g. water waves, sound waves and seismic waves) or light waves.