If you place a pencil of water, the top will appear curved. Then if you place the sugar in a cup and try the same experiment, the tip of the pencil should look even more curved, an example of the phenomenon of refraction.
Convenient refractometer due to the use of a new type of optical system into a practical use. The solution's solubility is measured as a function of the solution's refractive index as a function of its solubility, as the density of the material increases (for example, as the solubility of the material increases as the water dissolves), its refraction Rate cited a corresponding increase.
1, convenient refraction instrument using the prism holding a higher refractive index than the test solution theory; by measuring the solution to measure the solubility or refractive index.
2, the test solution is relatively weak, the refractive index of the test solution is higher than the prism, so the angle of refraction is relatively large.
3, the test solution is relatively strong, the refractive index of the test solution is lower than the prism, so the angle of refraction is relatively small.