PURPOSE: To demonstrate the concept of birefringence

DESCRIPTION: Also known as "Icelandic Spar", viewing objects (usually text) through a calcite crystal is the classic demonstration of birefringence.

SETUP TIME: Minimal

COMPONENT LIST:

Calcite Crystals         Located in a box in the optics cabinet marked "Icelandic Spar"

SUGGESTIONS: Practice ahead of time to see what will be most easily viewed by students.

REFERENCES: PIRA 6H35.10

OTHER NOTES: The nice big new chunk of calcite is courtesy of Dr. Finkelstein. Thank you!