This Demo does not work very well. I have tried different things and it seems that the rotation is so small that it is difficult to see. But some do like this demo.
Sugar is used to rotate the plane of polarized light.
Dextrose will rotate the polarized light clockwise. Use polarizing discs to extinguish light by turning top disc so white stickers on disc line up. Prof. Starn used it in C102, Spring '94. See next page for more information.