Lens (thick lens) and mirror - Jan 27, 2009

This applet allows the user to make a lens or a mirror and observe its effect on distant light. The user can change the thickness, the curvatures, the diameter, the index of refraction of the lens, and the index of refraction of the surrounding medium. Several special cases are pre-programmed and can be invoked by clicking on a link.

PhET Simulation: Geometric Optics - Dec 27, 2008

This interactive java application allows you to investigate the properties of converging lenses.  You can change the index of refraction, the diameter and the radius of curvature of the lens. You can also change the types of objects used and the types of rays shown.

PhET Simulations: Ladybug Revolution - Nov 10, 2008

This is PhET simulation on the topic of circular motion featuring one or two ladybugs. Users can change the various initial kinematics quantities and display time progression vectors, graphs and data of these kinematics quantities.

Mag Lab U: Learning about Electricity and Magnetism - Oct 7, 2008

This website featurs photo, video, and simulation galleries that explore the fascinating worlds of electricity and magnetism. This extensive library includes illustrated tutorials, historical facts, and applications to new technology.

LTU Physlet: Presenting .. Your Equipotentials! - Sep 7, 2008

This applet shows the equipotential lines and the electric field lines for a single positive or negative charge, two equal positive or negative charges, two unequal like or unlike charges, and unequal unlike charges.