6H35 Birefringence

Karo Syrup Tank

Many colors can be seen as more syrup is added or the polaroid sheet is turned.
Catalog: 
6H30.40A
Location: 
Gc3, PS H359(ref.)
Fill a glass container with Karo syrup and insert glass objects (lenses). View the collection with crossed Polaroids on the overhead projector.

Two calcite crystals

Two images show up from the printed material below. Rotate the crystal and obser
Catalog: 
6H35.10
Location: 
Gc2
Calcite crystals - birefringence