L: Geometric Optics

These demonstrations offer a simple introduction to the production and transmission of light, and to basic principles of ray optics.

These demonstrations present the optical principles and uses of plane mirrors, including half-silvered mirrors.

Here you will find examples of concave and convex mirrors, and some of their applications.

This section holds examples of refraction, and of transitions between regions of different indices of refraction.

These demonstrations provide examples of total internal reflection, including applications to fiber-optics.

These demonstrations provide examples of various sorts of lenses and their applications, focusing and its complications, and distortion.

This section contains examples of the construction and use of various optical devices and instruments, including cameras, projectors, and magnifiers of many varieties.