y, and double refraction fails.Only a single image can be seen from light passing through thecrystal parallel to the optic axis. 107. The lateral displacement of the E-ray.—We can nowexplain why the extraordinary ray receives a lateral displace-ment in going through a block of calcite (not parallel… … fronts advancing in the direction of the arrow, perpendicularto the surface. The optic axis is parallel to Oc, in the plane of the paper. According to Huyghensprinciple, each point in the surfacewill, when a wavefront strikes it,become the center of wavelets thatwill advance into the calcite,…
Light
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