This Exploratorium site contains an activity about afterimages, the lingering images seen after staring at a particular stimulus. Participants look at bird shapes of different colors for a while and then look away,...

This site provides an activity on reflection using just three mirrors and duct tape. A kaleidoscope effect is produced to show multiple images of an object, and a corner mirror is created to demonstrate a reflector that...

This website from the Exploratorium provides a demonstration of total internal reflection. The activity uses a fish aquarium to illustrate how a transparent material like water can act as a reflector. The site provides...

This Exploratorium site contains an activity to produce images with a cylindrical mirror. The mirror is made of aluminized Mylar backed with construction paper. The site provides diagrams to explain the observed...

This site from the Exploratorium contains a simple demonstration of how objects can disappear when placed in a liquid. The activity uses glass objects and Wesson™ oil. The site provides an explanation of the refraction...