|Ejs Open Source Propagation of Electromagnetic Wave Model Java Applet updated with wavelength showing, different implementation axes possible, side view etc|
author: fu-kwun hwang and lookang
|Ejs Open Source Propagation of Electromagnetic Wave Model Java Applet|
Ejs Open Source Propagation of Electromagnetic Wave Model Java Applet by Fu-Kwun Hwang remixed by lookang
Full screen applet
kindly hosted in NTNUJAVA Virtual Physics Laboratory by Professor Fu-Kwun Hwang http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2307.0 alternatively, go direct to http://www.phy.ntnu.edu.tw/ntnujava/index.php?board=28.0 Collaborative Community of EJS (Moderator: lookang) and register , login and download all of them for free :) This work is licensed under a Creative Commons Attribution 3.0 Singapore License
Author: Fu-Kwun Hwang and lookang
Wave modeltransverse wave meaning that the oscillations of the waves are perpendicular to the direction of energy transfer and travel. An important aspect of the nature of light is frequency. The frequency of a wave is its rate of oscillation and is measured in hertz, the SI unit of frequency, where one hertz is equal to one oscillation per second. Light usually has a spectrum of frequencies which sum together to form the resultant wave. Different frequencies undergo different angles of refraction.
|Electromagnetic waves can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This 3D diagram shows a plane linearly polarized wave propagating from left to right|
Interference is the superposition of two or more waves resulting in a new wave pattern. If the fields have components in the same direction, they constructively interfere, while opposite directions cause destructive interference.
Electromagnetic waves can be generated by a variety of methods, such as a discharging spark or by an oscillating molecular dipole. Visible light is a commonly studied form of electromagnetic radiation, and exhibits oscillating electric and magnetic fields whose amplitudes and directions are represented by vectors that undulate in phase as sinusoidal waves in two mutually perpendicular (orthogonal) planes.
This java applet shows how the electromagnetic wave propagated in the media.
Red segment represent Electric Field
Blue segment represent Magnetic Field
You can modify: T :period of the wave. => wavelength(lamda)=vy*T
Ez: electric field magnitude
vy: wave velocity. =>
where Bx is magnetic field magnitude
Please notice that E/B field are in phase when electromagnetic is travel in vacuum.
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
redesign the view made the 3D panel and all drawing in newer Ejs object framework
add vBx = Bx*20 for the scale to be same as in Fu-Kwun version
add vEz = Ez*1.5
added boolean to fix un declared error color scheme hints
added for more sense making evol page now in ODE format add "electromagnetic wave direction" and arrow inspired by Juan Aguirregabiria edited by Wolfgang Christian http://www.compadre.org/osp/items/detail.cfm?ID=7903
add k, omega, t etc add control buttons
|The electric field is in a vertical plane and the magnetic field in a horizontal plane|
|This 3D diagram shows a plane linearly polarized wave propagating from left to right|
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