蔗糖和薄荷醇的旋光测定
Optical rotation is the property of substances, rotating the plane of polarization when linearly-polarized
light passes through such substances. This is the property which occurs specifically to optical active
substances in which the refractive indices of right and left circularly-polarized light are different. Optical
rotation that rotate light in a clockwise direction as viewed towards the light source is defined as
dextrorotation (+) and the opposite, levorotation (-).