Referenzen
- Vorführexperimente, Videos
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How Sugar Twists Light into a Rainbow
Simple explanation and setup with monochromatic light source.
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Optical rotation of sugars – chirality
Phenomenom presentation with various sugar versions.
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This tests your understanding of light | The barber pole effect
Basic explanation and "reaction" to Steve Mould's video. Watch also the following videos.
In the video description there are also links to the animation tools. -
Why Sugar Always Twists Light To The Right - Optical Rotation
Basic explanation why glucose/dextrose (sugar ) always twists light to the right.
- Wissenschaftliche Artikel
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A Lab Tool for Sugar: The Optical Rotatory Dispersion of d-Glucose from Its Mutarotation Kinetics with a Home-Made Polarimeter
A polarimeter constructed from off-the-shelf parts was used to measure the optical rotation of sugars as the central activity in a second-year online analytical chemistry laboratory course. The students built the instrument and performed measurements of sugars at three different wavelengths. The kinetics for the mutarotation of glucose was measured, and its equilibrium constant was used to determine the optical rotatory dispersion of pure α- and β-d-glucose in solution, via linearization of Drude’s equation.
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A visual understanding of optical rotation using corn syrup
In this paper a visual demonstration of optical rotation is presented, with quantitative techniques suitable for an undergraduate-laboratory experiment. Linearly-polarized lasers of various wavelengths are propagated through a glass tube containing corn syrup. The rotation of the plane of polarization of the light is visible with the naked eye.
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Observations and theoretical evaluations of color changes of traveling light beams caused by optical rotation phenomena in sugared water and their applications for educational purposes
Investigations were conducted for the purposes of understanding coloring phenomena to be caused by optical rotation of polarized light beams in sugared water. By allowing polarized laser beams in red, blue or green to travel in sugared water of certain concentrations, changes in their intensities were measured while changing a distance between a pair of polarizing plates in the sugared water. An equation was established for a theoretical value for the angle of rotation for light of any wavelengths travelling in sugared water of any concentrations.
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Optical Rotatory Dispersion Measurement of D-Glucose with Fixed Polarizer Analyzer Accessory in Conventional Spectrophotometer
Mounting of a polarizer before sample and an analyzer behind sample allows the determination of the optical rotatory dispersion of optical active media by measurement of the transmission ratio of crossed and parallel arranged polarizer and analyzer. A formula for the determination of the angle of rotation is derived from the transmission ratio. The arrangement is applied to determine the molar optical rotation of D-glucose in water in the wavelength range from 220 nm to 820 nm.
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The rainbow beam experiment: direct visualization of dipole scattering and optical rotatory dispersion
They show an experiment for the direct visualization of two subtle optical phenomena: optical rotation in a chiral medium and the angular profile of point dipole scattering. By passing a narrowband linear-polarized light beam into a tank filled with a sucrose solution, they see dark and light bands that exhibit the change in polarization state with propagation.
- Online-Ressourcen
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EMANIM
Online animation tool, which shows electromagnetic waves in vacuum and in matter.