Tuesday, 16 February 2016

Waves

Waves

A wave can be described as a disturbance that travels through a medium from one location to another location.





Transverse Waves

  • A transverse wave is a moving wave that consists of oscillations occurring perpendicular (or right angled) to the direction of energy transfer. 
  • If transverse wave is moving in the positive x-direction, its oscillations are in up and down directions that lie in the y–z plane. 



Longitudinal waves

  • In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. 
  • The animation at below shows a one-dimensional longitudinal plane wave propagating down a tube.
  • The particles do not move down the tube with the wave; they simply oscillate back and forth about their individual equilibrium positions.
animation showing particle motion for a longitudinal pressure wave
animation showing particle motion for a longitudinal pressure wave highlighting the difference between particle motion and wave propagation.

Frequency

The frequency of a wave refers to how often the particles of the medium vibrate when a wave passes through the medium. 




Wavelength

Wavelength is the distance between identical points in the adjacent cycles of a waveform.


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