This site features a clear picture of the plant cell with a concise explanation of its key parts and their functions.

An in-depth discussion on reflection of light can be found here. Among the topics discussed include are the difference between specular and diffuse reflection, concave and convex mirrors, facets, total internal reflection, and much more. Also provided are some interactive Java tutorials on reflection of light.

This site discusses primary lighting sources and gives information on the different properties and spectral characteristics of each. Also includes links to some interactive Java applets.

Molecular Expressions is a comprehensive scientific educational resource that features a considerable collection of interactive Java tutorials relating to electricity and magnetism. Tutorials range in complexity and difficulty of concepts covered; visitors can explore most anything from a simple cathode ray tube to a pulsed magnet or the effects of scalar coupling.

This interactive computer microscope Java tutorial explores how the hardware (QX3 microscope) and computer software work together to produce digital images.

You can use shadows and a meter stick to measure very tall objects from the ground--and before you try this experiment yourself, see how it works with a Java applet that measures the height of a Tyrannosaurus Rex.

Manipulate the incident angle, color of light, wavelength, and medium to see how the refracted angle is affected.

A simulation of the Rutherford experiment. Includes an animation and an explanation of the history behind the experiment.