Ejs Open Source Propagation of Electromagnetic Wave Model Java Applet by Juan Aguirregabiria & Fu-Kwun Hwang
remixed by lookang

/htdocs/ntnujava/ejsuser/14019/users/sgeducation/lookang/emwavewee_pkg/emwavewee.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1052.7kB):double click downloaded file to run it. (112 times by 68 users) , Download EJS source (7 times by 7 users) View EJS source


This java applet shows how the electromagnetic wave propagated in the media.
Red segment represent Electric Field
Gray segment represent Magnetic Field
You can modify:
T :period of the wave. => wavelength(lamda)=vy*T
Ez: electric field magnitude
vy: wave velocity. => Ez/Bx=vy, where Bx is magnetic field magnitude
Please notice that E/B field are in phase when electromagnetic is travel in vacuum.


Electromagnetic wave adapted from http://www.compadre.org/osp/items/detail.cfm?ID=7903
The fields in an electromagnetic wave moving along the X axis are
E = Ez cos(kx-?t) k
B = Bx cos(kx-?t) i = (cE)/c^2
where c = c j, Bx = Ez/c .
In this simulation c = Vy

You can choose the amplitudes Ez, as well as the period T,
therefore, wavelength ? = 2?/k.

The point of view of the three-dimensional projection can be changed with the cursors or the mouse.
The whole image can be moved with the mouse while pressing Ctrl.
To change the zoom in the projection, press Shift when moving up or down the mouse pointer.
Put the mouse pointer over an element to get information about it.


other Ejs models
Propagation of Electromagnetic Wave by Fu-Kwun Hwang http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=35.0
Ejs Electromagnetic Wave Model written by Juan Aguirregabiria edited by Wolfgang Christian http://www.compadre.org/osp/items/detail.cfm?ID=7903