Diffraction Light can bend around edges. Polarized Light Mosaic With polarized light, you can make a stained glass window without glass. If you vibrate something at just the right frequency, you can get a big reaction. Slinky in hand Hold a slinky between your hands, model transverse wave resonances as well as longitudinal wave resonances. Learn about nodes and antinodes of motion and compression.
Soap Bubbles Create geometric art with soap films.
Spectra Fingerprints for light sources.