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  2. Polarimeter - Wikipedia

    en.wikipedia.org/wiki/Polarimeter

    A polarimeter [1] is a scientific instrument used to measure optical rotation: the angle of rotation caused by passing linearly polarized light through an optically active substance. [ 2 ] Some chemical substances are optically active, and linearly polarized (uni-directional) light will rotate either to the left (counter-clockwise) or right ...

  3. Polarimetry - Wikipedia

    en.wikipedia.org/wiki/Polarimetry

    A simple polarimeter to measure this rotation consists of a long tube with flat glass ends, into which the sample is placed. At each end of the tube is a Nicol prism or other polarizer. Light is shone through the tube, and the prism at the other end, attached to an eye-piece, is rotated to arrive at the region of complete brightness or that of ...

  4. Optical rotation - Wikipedia

    en.wikipedia.org/wiki/Optical_rotation

    Optical activity is measured using a polarized source and polarimeter. This is a tool particularly used in the sugar industry to measure the sugar concentration of syrup, and generally in chemistry to measure the concentration or enantiomeric ratio of chiral molecules in solution.

  5. Specific rotation - Wikipedia

    en.wikipedia.org/wiki/Specific_rotation

    Recording optical rotation with a polarimeter: The plane of polarisation of plane polarised light (4) rotates (6) as it passes through an optically active sample (5). This angle is determined with a rotatable polarizing filter (7). In chemistry, specific rotation ([α]) is a property of a chiral chemical compound.

  6. Stokes parameters - Wikipedia

    en.wikipedia.org/wiki/Stokes_parameters

    The Stokes I, Q, U and V parameters. The Stokes parameters are a set of values that describe the polarization state of electromagnetic radiation.They were defined by George Gabriel Stokes in 1851, [1] [2] as a mathematically convenient alternative to the more common description of incoherent or partially polarized radiation in terms of its total intensity (I), (fractional) degree of ...

  7. Sherman function - Wikipedia

    en.wikipedia.org/wiki/Sherman_function

    The Sherman function () is a measure of the probability of a spin-up electron to be scattered, at a specific angle , to the right or to the left of the target, due to spin-orbit coupling. [ 8 ] [ 9 ] It can assume values ranging from -1 (spin-up electron is scattered with 100% probability to the left of the target) to +1 (spin-up electron is ...

  8. Waveplate - Wikipedia

    en.wikipedia.org/wiki/Waveplate

    Two waves differing by a quarter-phase shift for one axis Creating circular polarization using a quarter-wave plate and a polarizing filter. For a quarter-wave plate, the relationship between L, Δn, and λ 0 is chosen so that the phase shift between polarization components is Γ = π/2.

  9. Polarization (waves) - Wikipedia

    en.wikipedia.org/wiki/Polarization_(waves)

    As a function of time t and spatial position z (since for a plane wave in the +z direction the fields have no dependence on x or y) these complex fields can be written as: (,) = [] = [] and (,) = [] = [] (), where λ = λ 0 /n is the wavelength in the medium (whose refractive index is n) and T = 1/f is the period of the wave.

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