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The refractometer is used to help identify gem materials by measuring their refractive index, one of the principal properties used in determining the type of a gemstone. Due to the dependence of the refractive index on the wavelength of the light used ( i.e. dispersion ), the measurement is normally taken at the wavelength of the sodium line D ...
Refractometry is the analytical method of measuring substances' refractive index (one of their fundamental physical properties) in order to, for instance, assess their composition or purity. A refractometer is the instrument used to measure refractive index ("RI"). Although refractometers are best known for measuring liquids, they are also used ...
Measuring brix and percent acidity of a sudachi. Degrees Brix(symbol °Bx) is a measure of the dissolved solids in a liquid, and is commonly used to measure dissolved sugarcontent of an aqueous solution.[1] One degree Brix is 1 gram of sucrosein 100 grams of solution and represents the strength of the solution as percentage by mass.
Ernst Abbe (1840–1905), working for Carl Zeiss AG in Jena, Germany in the late 19th century, was the first to develop a laboratory refractometer. These first instruments had built-in thermometers and required circulating water to control instrument and fluid temperatures. They also had adjustments for eliminating the effects of dispersion and ...
In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. Refraction of a light ray. The refractive index determines how much the path of light is bent, or refracted, when entering a material. This is described by Snell's law of ...
Some instruments are available with multiple scales, or the ability to input a special scale using known conversion information. There are some digital handheld refractometers that are IP65 water-resistant, and thus washable under a running faucet. See also. Refractometer Types Traditional handheld refractometer; Abbe refractometer
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