Standing+Waves

__** Standing Waves **__ Basic explanation- A wave outline that looks stationary that is produced by two identical waves moving in opposite directions through a medium. When the two exact waves collide going in opposite directions, they may be out of phase, and if so, they will not form the standing wave immediately. They will interfere with each other and slowly take shape to form a wave of maximum displacement that appears to stand still, or a standing wave. Particles in a standing wave still oscillate up and down but the troughs and crests remain in fixed positions so the wave looks stationary.



The particles in the standing waves that have a zero displacement are called __nodes__ and the points in the standing waves that have maximum displacement are called __antinodes.__ These components basically mark equilibrium and the amplitude of the wave.

Waves are considered in phase when their crests and troughs line up and they are of equal displacement, or in other words, identical. http://streaming.teachertube.com/viewVideo.php?video_id=141761&title=podcast_4_2___standing_waves__

__The following video is an example of how to demonstrate a standing wave__ __[]__ __ A Rubens tube is a visable way to demonstrate a standing wave. A Rubens tube is basically a pipe with holes cut in the top and gas put into it. A speaker is put on one side of the pipe and when the speaker is turned on, the frequency will create lower and higher pressure points. Where there is osillating pressure due to sound waves, less gas escapes and the flames will be less higher. If a constant frequency is created inside the tube, a standing wave can be created. __

Resources __ Principles of Physics version 2.10.018 © 2001-2010 Kinetic Books Company __ __http://streaming.teachertube.com/viewVideo.php?video_id=141761&title=podcast_4_2___standing_waves http://hyperphysics.phy-astr.gsu.edu/hbase/waves/standw.html http://cnx.org/content/m12413/latest/