Spheres

Optical Calcite Spheres - Iceland Spar Sphere

Quantity 1 2 3 4

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$13.50 $18.00

• Details
  These optical calcite spheres come with a free sphere holder and clearly demonstrate the phenomenon of birefringence, or double refraction, for which optical calcite (also known as Iceland spar) is famous. This effect was one of the earliest discoveries in the study of optics and is believed to have been used for navigation on cloudy days. Each sphere measures approximately 1.5 inches in diameter.
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