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Information about this web site => Request for physics Simulations => Topic started by: reuven on December 16, 2010, 02:38:50 am



Title: Electromagnetic wave
Post by: reuven on December 16, 2010, 02:38:50 am

Application that displays an electromagnetic wave generated, gives only one row of three-dimensional space, let me ask you to create a simulation of an electromagnetic wave, similar to reality, Achsahgal spreads to all sides of the space, I can see how the intensity of the wave decreases the distance squared. It's very help me, perhaps for many others to understand the interpretation of electromagnetic waves.

Great appreciation and gratitude. Reuben.


Title: Re: Electromagnetic wave
Post by: Fu-Kwun Hwang on December 16, 2010, 04:29:49 pm
Are you talking about simulation at Propagation of Electromagnetic Wave  (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=35.0)?
The above case only show EM waves in 1D.

Electromagnetic wave are represented with Efield/Bfield vectors.
IT might be too complicate to visualize if too many wave are presented at the same time (too many arrows)?
It is possible to use waveform to represent waves moving uniformed in 2D.   

It will also be too complicated to present all wave in 3D.

Do you have a better ideas to represent many waves in 3D? Could you draw a picture and upload as attached file so that I can understand  what you want to do. Waiting for your answer. ;)


Title: Re: Electromagnetic wave
Post by: reuven on December 17, 2010, 04:16:34 am
Thank you, exactly what I meant
I think you should create three-dimensional sphere surrounding the Electric Charge, the ball will be translucent, and will be composed of blocks like this This http://he.wikipedia.org/wiki/%D7%A7%D7%95%D7%91%D7%A5:Hexahedron.jpg, instead of straight lines do [<<<<<<] arrows represent the direction of the Field, vertical lines represent the horizontal magnetic field the electric field, the power would be represented by the intensity of the color or size, You should create at least five blocks each wave to show how the intensity of the wave changes.


Title: Re: Electromagnetic wave
Post by: Fu-Kwun Hwang on January 12, 2011, 09:36:36 pm
The intensity of the wave become weaker when it spread further away into 2D or 3D space.
If it is a point source and the wave spread into 3D uniformly,
 the surface at radius r is $4\pi r^2$, so the intensity decrease as $\tfrac{1}{r^2}$.
Is it easier to understand how the intensity decrease with r this way?
It will be too complicate to draw too many wave together.
I did not know how to present your ideas with the URL you have procided. Sorry!  ???