PAUL SILVERMAN / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY PAUL SILVERMAN / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY
A crystal of calcite placed upon a grid pattern to demonstrate the phenomenon of double refraction, or birefringence, the formation of two refracted rays from a single incident ray. The two refracted rays, called the ordinary and extraordinary rays, are polarized at right angles to one another. The ordinary ray obeys the normal laws of refraction while the extraordinary ray follows different laws. Hence two images are formed.
Model release not required. Property release not required.