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An interaction between two opposites produces a unique outcome. ..."Jules Henri Poincare(1854-1912, One of France's greatest mathematicians)"
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NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/ > Easy Java Simulations (2001- ) > Collaborative Community of EJS (Moderator: lookang) > Longitudinal Wave Function Java Applet
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lookang
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on: January 30, 2009, 01:19:08 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE
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Longtinual Wave Wave Function Java Applet :
http://home.phy.ntnu.edu.tw/~lookang/EJS_4.1_090122/WaveFunctionPlotterLongitinualwavewee02.html

Some physics is not making sense, can comment what is strange?






param name="draggable" value="true">






some reference
http://www.antonine-education.co.uk/physics_a2/module_4/Topic_4/graphical_representation_of_wave.htm



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« Last Edit: January 31, 2009, 10:21:47 am by lookang » Logged
lookang
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Reply #1 on: January 30, 2009, 01:51:02 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE
Is the approach of using a function to simulate Longitudinal Wave not suitable?

do i need a another way to find the stationary Longitudinal Wave ?

it seems to be correct from traveling Longitudinal Wave.

thanks!

* wrongLongitudinalWave.PNG (53.93 KB, 1024x768 - viewed 574 times.)
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Fu-Kwun Hwang
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Reply #2 on: January 30, 2009, 03:50:54 pm »
I do not understand your question?
May be you can check out Transverse Wave and Longitudinal Wave.
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Reply #3 on: January 31, 2009, 12:24:18 am »
i embed your applet inside the same post for easy reference.

notice your applet seems correct for a stationary wave Longtinual Wave.

my applet has a problem, the points of compression is not the stationary nodes, for example.

i puzzled if i did it wrongly with no physics rules but mathematical ones ?
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Fu-Kwun Hwang
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Reply #4 on: January 31, 2009, 09:02:21 am »
You draw sin-wave and cos-wave in your simulation.
I did not find you try to draw the visual representation for Longtinual Wave.
It is easier to draw visual representation for transverse wave.
Because the y-offset is the same, the displacement is proportion to either sin/cos function.

However, the mathematic calculation is a little more complicate if you want to draw visual representation for Longtinual Wave.
May be you are confused between wave function and visualization of wave motion.
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Reply #5 on: January 31, 2009, 10:21:23 am » posted from:Singapore,,Singapore
Quote from: Fu-Kwun Hwang on January 31, 2009, 09:02:21 am
However, the mathematic calculation is a little more complicate if you want to draw visual representation for Longtinual Wave.
May be you are confused between wave function and visualization of wave motion.
Agreed. indeed i am thinking wave function can generate the Longitudinal visual representation.

looks like it is an un-finish applet.

think i will just make it animate one particular function, rather than simulate any wave function, in order to get the visual representation for Longitudinal wave correct for one function.

what do you think ?
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