THE SMART TRICK OF BIREFRINGENT CRYSTAL THAT NOBODY IS DISCUSSING

各向异性透明晶体如方解石、石英等的折射率，是其固有的特性，称为永久双折射。In each frame of Figure eight, the axis in the microscope polarizer is indicated by the capital letter P and is also oriented in an East-West (horizontal) route. The axis on the microscope analyzer is indicated via the letter A and is also