Links for applets on Refraction

I am currently looking for links on interesting sites dealing with refraction. You may also find some interesting material on You Tube, Yahoo Video or Google Video. If you find anything which you think others my find interesting.. post it up folks.

Links for applets on Concave Mirrors

Examples of Ray Diagrams:

Many thanks to the people who have submitted the links to applets on Concave Mirrors.

http://www.phy.ntnu.edu.tw/oldjava/optics/mirror_e.html

draw a picture and computer draws the mirror image (Submitted by Richard Sept 07)

http://micro.magnet.fsu.edu/primer/java/mirrors/concave1.htmlT

his applet shows how the type of images that can be formed using a concave mirror (Submitted by Connor & Simon Sept 07)

http://www.phys.ufl.edu/~phy3054/light/mirror/applets/cavemir/Welcome.html

A nice and simple applet, which allows you to move the object and track the light rays as they form an image in a concave mirror (Submitted by Conor & Cillian Sept 07)

http://en.wikipedia.org/wiki/Convex_mirror

Very nice link, which takes you to wikipedia and explains how concave mirrors work and also gives some very nice examples of ray tracing diagrams(Submitted by Adam Sept 07)

http://ephysics.physics.ucla.edu/optics/html/mirrors.htm

Gives some nice examples of concave mirrors(Submitted by Dylan Sept 07)