Electromagnetic Waves

Radio Waves and EM Fields

Broadcast radio waves from KPhET. Wiggle the transmitter electron manually or have it oscillate automatically. Display the field as a curve or vectors. The strip chart shows the electron positions at the transmitter and at the receiver.

EM Wave Animation
This animation shows an electromagnetic wave, namely a plane polarized wave, which propagates in positive x direction. The vectors of the electric field (red) are parallel to the y axis, the vectors of the magnetic field (blue) are parallel to the z axis.
EM Wave A 3 dimensional animation of the "far" fields of an oscillating charge.
Electromagnetic Waves

The Electromagnetic Wave model displays the electric field and magnetic field of an electromagnetic wave.  The simulation allows an arbitrarily polarized wave to be created. The magnitude of the electric field components and the relative phase between the components of the electric field can all be changed via sliders.

Color Vision

Make a whole rainbow by mixing red, green, and blue light. Change the wavelength of a monochromatic beam or filter white light. View the light as a solid beam, or see the individual photons.

Additive Colors
This applets allows the user to add varying amounts of red, green, and blue and see the resulting color.
Doppler Effect Explanation Illustrating the classical Doppler Effect for sound waves.
Doppler Wave Fronts Illustrating the wave fronts of a wave for a moving source.
Doppler Effect

The Doppler Effect model displays the detection of sound waves from a moving source and the change in frequency of the detected wave via the Doppler effect. In addition to the wave fronts from the source a graph depicting the time of emission and time of detection of each of the wave fronts is given.

Circular Polarization Circular polarization generated from a linearly polarized electromagnetic wave by a quarter-wave plate.
This applet shows circularly polarized light passing through a series of three polarizers. The user can control the angle of each polarizer.

The Polarizer program displays the effect of a plane polarizer on an incident electromagnetic wave.   The polarization of the electromagnetic wave and the orientation of the polarizer can be modified.

Brewster's Angle

The Brewster's Angle model displays the electric field of an electromagnetic wave incident on a change of index of refraction.  The simulation allows an arbitrarily linearly (in parallel and perpendicular components) polarized wave to encounter the change of index of refraction.

The downloadable Java Applets were taken either from PhET or Open Source Physics.

The Flash Animations were all taken from David M. Harrison from the University of Toronto.