Phonecord Harmonics , Explore the frequencies of the harmonics of an oscillating phonecord. Pinhole images , explore your eye and brain and image inversion Plant Leaf Patterns , a mathematician designs a plant, place leaves around a plant 137.5 degrees apart. Polarized light from a laptop computer Use a portable computer liquid crystal display as a source of polarized light. Poisson Spot , project the shadow of a sphere and notice a bright point of light in its center. Project a Spectrum , Use a diffraction Grating and an overhead projector.
Film Can, Make a water pump out of a film can.
Quiet Lightning , Explorations at the Exploratorium Exhibit. Ray Tracing , How to use rays to predict the positions of images made by lenses and mirrors. Reaction Timer , measure your reaction time with a ruler. Reflections on an open end , How does sound bounce off the open end of a tube. Right Left Reversal in a flat mirror. , use hands to explore what a mirror does to right and left Right and Left in 3 different mirrors , what do flat, cylindrical and spherical mirrors do to right and left.