Editing Brix (section)

===Refractive index===
Dissolution of sucrose and other sugars in water changes not only its specific gravity but its optical properties, in particular its [[refractive index]] and the extent to which it rotates the plane of linearly [[Polarization (waves)|polarized]] light. The refractive index, ''n''<sub>D</sub>, for sucrose solutions of various percentage by mass has been measured and tables of ''n''<sub>D</sub> vs. °Bx published. As with the hydrometer, it is possible to use these tables to calibrate a [[refractometer]] so that it reads directly in °Bx. Calibration is usually based on the ICUMSA tables,<ref>"ICUMSA Methods Book", op. cit.; Specification and Standard SPS-3 Refractometry and Tables – Official; Tables A-F</ref> but the user of an electronic refractometer should verify this.