polarimeter
/,poulə'rimitə/
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Definition
- Noun:
- An optical instrument for measuring the angle of rotation of the plane of polarization of light: A polarimeter is a scientific device used to determine the optical activity of a substance by measuring how much it rotates the plane of polarized light passing through it.
Usage
- A polarimeter is used primarily in chemistry, physics, and pharmaceuticals to analyze substances, determine their concentration, or identify their chiral properties.
- The core operation involves passing plane-polarized light through a sample and measuring the angle through which the light's vibration plane is rotated.
Examples
- Noun:
- The chemist used a polarimeter to determine the purity of the sugar solution.
- Optical activity, measured with a polarimeter, is a key property of many organic compounds.
Advanced Usage
- "Saccharimeter": A specific type of polarimeter used for measuring the concentration of sugar solutions.
- The quality control lab employs a saccharimeter, a specialized polarimeter, to test the syrup.
Variants and Related Words
- Polarimetry (n): The science or process of measuring the polarization of light or the optical activity of materials.
- Polarimetry is an essential technique in analytical chemistry.
- Polarimetric (adj): Relating to or involving a polarimeter or polarimetry.
- The study included a detailed polarimetric analysis.
Synonyms
- Optical rotatory device: A more general term for an instrument that measures the rotation of polarized light.
- Saccharimeter: (Context-specific) A polarimeter calibrated for sugar analysis.
Related Terms (Not Phrasal Verbs)
- Optical activity: The property of a substance to rotate the plane of polarized light.
- Polarizer: An optical filter that produces plane-polarized light from unpolarized light, often used in conjunction with a polarimeter.
Noun
- an optical device used to measure the rotation of the plane of vibration of polarized light