Birefringent materials, such as calcite and quartz, are so named because they have two refractive indices. In this article we demonstrate how the optical properties of birefringent materials may be observed and photographed.

1.
David
Falk
,
Dieter
Brill
, and
David
Stork
,
Seeing the Light: Optics in Nature, Photography, Color, Vision, and Holography
(
Wiley and Sons Inc.
,
Chichester
,
1986
), p.
360
.
2.
Marshall
Ellenstein
, “
The broken-protractor prediction trick
,”
Phys. Teach.
40
,
52
(
Jan.
2002
).
3.
H.
Fakhruddin
, “
Some activities with polarized light from a laptop LCD screen
,”
Phys. Teach.
46
,
229
231
(
April
2008
).
4.
How To Create Color Wheel Diagram In PowerPoint
,” YouTube, https://www.youtube.com/watch?v=d_MNUVYhfuQ.
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