The group velocity is one half the phase velocity. A wave in which the group and phase velocities differ is called dispersive. ==The generation of waves by wind== The air-water interface is now endowed with a surface roughness due to the capillary-gravity waves, and a second phase of wave growth takes place. A wave established on the surface eithe...
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http://en.wikipedia.org/wiki/Gravity_wave
(gravitational wave) A wave disturbance in which buoyancy (or reduced gravity) acts as restoring force on parcels displaced from hydrostatic equilibrium. There is a direct oscillatory conversion between potential and kinetic energy in the wave motion.
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http://nsidc.org/arcticmet/glossary/gravity_wave.html
[4 related articles]
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http://www.britannica.com/eb/a-z/g/61
Waves that propagate under the influence of buoyancy forces. Gravity waves include surface gravity waves, such as waves on the surface of the ocean, interfacial gravity waves, such as waves at the interface between fresh surface water and underlying salty ocean water, and internal gravity waves which propagate vertically as well as horizontally in ...
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http://www.encyclo.co.uk/local/20124
A wave disturbance in which buoyancy acts as the restoring force on parcels displaced from hydrostatic equilibrium. Waves on the ocean are examples of gravity waves.
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http://www.encyclo.co.uk/local/22268
[
n] - (physics) a wave that is hypothesized to propagate gravity and to travel at the speed of light
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http://www.webdictionary.co.uk/definition.php?query=gravity%20wave
a wave disturbance in which buoyancy (or reduced gravity) acts as a restoring force on parcels displaced from hydrostatic equilibrium; there is a direct oscillatory conversion between potential and kinetic energy in the wave motion.
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https://nsidc.org/cryosphere/glossary?page=11
A wave whose velocity of propagation is controlled primarily by gravity. Water waves more than 5 cm long are considered gravity waves. Waves longer than 2.5 cm and shorter than 5 cm are in an indeterminate zone between CAPILLARY and GRAVITY WAVES. See RIPPLE. See Figure 10.
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https://www.encyclo.co.uk/local/20127
A wave disturbance caused by the acceleration of masses.
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https://www.encyclo.co.uk/local/20687
gravitation wave noun (physics) a wave that is hypothesized to propagate gravity and to travel at the speed of light
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https://www.encyclo.co.uk/local/20974
Wave action caused by the swimmers' bodies moving through the water. Gravity waves move
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https://www.encyclo.co.uk/local/22351
A wave created by a swimmer, which moves down and forward before bouncing off the bottom of the pool. Gravity waves cause turbulence at the surface and potentially slow the swimmer.
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https://www.encyclo.co.uk/local/22352
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