Optical Activity - Glass In Karo Syrup Tank
Exotic demonstration of optical activity.
Karo syrup tank with stressed glass artifacts, rotating polarizing sheet.
Try not to disturb the various parts so that things fall over, etc. The Karo syrup gets pretty groty after a few years, and we don't want to have to go in there to fix it.
A trapezoidal tank, lit from behind by polarized light from a rotating polarizer, contains various examples of optically active materials, including stressed glass. As the rear polaroid rotates a fixed polaroid on the front of the tank makes the patterns visible. This is a wonderful hallway demonstration.
Lecture Demonstrations Design Sketches and Calculations.