A school of fish

We liked creating a prism with a mirror, light, and water (something similar is  described here ) and projecting the spectrum on the wall....

Resources for learning about lenses: How lenses for glasses are made Fascinating page on the Fresnel Lens (used in lighthouses) and w...

Sam taught some of the lessons on refraction since he knows a lot more about it than I do! He may have gotten a little carried away when ...

Polarization is one of those things I assumed I understood but I really didn't. Sam is always going on and on about it (every time he...