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Related Concept Videos

Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Standing Waves01:17

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Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
Modes of Standing Waves: II01:04

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Modes of Standing Waves - I01:03

Modes of Standing Waves - I

A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This phenomenon...
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A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
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Related Experiment Video

Updated: Jun 14, 2026

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Lagrangian coherent structures and internal wave attractors.

Wenbo Tang1, Thomas Peacock

  • 1School of Mathematical and Statistical Sciences, Arizona State University, Tempe, Arizona 85287, USA. wenbo.tang@asu.edu

Chaos (Woodbury, N.Y.)
|April 8, 2010
PubMed
Summary

Internal gravity waves form attractors in specific ocean geometries like the Luzon ridge. This study presents an efficient method to locate these wave attractors and quantify their attraction rate.

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Last Updated: Jun 14, 2026

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Area of Science:

  • Fluid dynamics
  • Oceanography
  • Geophysics

Background:

  • Internal gravity waves propagate in stratified fluids, with angles influenced by buoyancy and Coriolis frequencies.
  • Confined geometries, like submarine ridges, can host internal wave attractors, acting as Lagrangian coherent structures for energy flux.

Purpose of the Study:

  • To develop an efficient method for locating internal wave attractors.
  • To quantify the rate of attraction for these structures.
  • To apply the method to realistic oceanographic data.

Main Methods:

  • Development of a novel approach for efficient extraction of internal wave attractor locations.
  • Quantification of the attraction rate using the developed method.
  • Application to realistic geometry and stratification data from ocean observations.

Main Results:

  • The study successfully developed an efficient method to locate internal wave attractors.
  • The rate of attraction for these structures can be quantified.
  • A significant northern portion of the Luzon ridge was identified as capable of supporting internal wave attractors.

Conclusions:

  • The developed method offers an efficient alternative to traditional approaches for identifying internal wave attractors.
  • Internal wave attractors are present in the Luzon ridge, a geophysically relevant location.
  • This research enhances our understanding of wave dynamics in complex oceanic environments.