Abbe Refractometer
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Definition:
Common form of refractometer used for determining the refractive index of liquids. Good accuracy is attainable in the range of 1.3 to 1.7, readings being given to the fourth decimal place. The prisms, which constitute the most important part of the instrument, and hence the liquid held between their faces, are capable of being maintained accurately at the temperature of the determination. With the use of special liquids to form an optical seal to the prisms and a special technique of viewing, it is also used for determining the refractive index of solids, such as plastics cast in sheets, with polished surfaces and edges.
Definition Copyright ©1989 CRC Press LLC. All rights
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