You can get the concept of: The normal reaction, polarimeter, optical rotation.
Principle: The reaction of inversion of sucrose, catalyzed by protons, results in invert sugar, which is a mixture of glucose and fructose. The reaction is accompanied by a change in optical rotation of the system. Glucose rotates the plane of polarization of linearly polarized light to the right and the left inverse sugar. Shade polarimeter used in the experiment, measuring the angle of rotation of polarized light in the reaction of inversion of sucrose, depending on the time.
