in discussing calcite, we pointed out that its large birefringence arises from the fact th...

in discussing calcite, we pointed out that its large birefringence arises from the fact that the carbonate groups lie in parallel planes

a

b

c

(normal to the optic axis). Show in a sketch and explain why the polarization of the group will be less when  is perpendicular to the C03 plane than when  is parallel to it. What does this mean with respect to v± and vn, that is, the wave's speeds when  is linearly polarized perpendicular or parallel to the optic axis?