Refraction can be defined as the change of radiation direction when passing from one material to another, this phenomenon is associated with the differences in the speed of light propagation in the two media. The method to calculate the refractive index of a sample in order to know its purity is the refractometry and the instrument used to determine it is the refractometer.

Refractometers are devices that can come in various shapes and sizes. Generally, this equipment consists of a light source, a prismatic system, a container where the sample is placed; and a detector to measure the intensity of the light beam.

Types of refractometers

Characteristics of a refractometer

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