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Related Concept Videos

Measuring Reaction Rates03:09

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Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical field in...
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Related Experiment Video

Updated: Jun 15, 2026

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization
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Polarization effects in gloss measurements.

W Budde

    Applied Optics
    |March 10, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Gloss measurements are minimally affected by incident radiation polarization. This study demonstrates that sample gloss values remain accurate even when the black glass reference standard

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    Area of Science:

    • Optical physics
    • Materials science
    • Metrology

    Background:

    • Gloss measurement relies on specular reflectance ratios.
    • Polarization of incident light can influence reflectance measurements, especially near the Brewster angle.
    • Black glass is a common reference standard for gloss determination.

    Purpose of the Study:

    • To investigate the impact of incident radiation polarization on gloss measurements.
    • To determine if polarization effects at the Brewster angle of black glass affect sample gloss values.
    • To assess the reliability of gloss measurements under varying polarization conditions.

    Main Methods:

    • Gloss was determined as the ratio of specular reflectance of a sample to a black glass standard.
    • Measurements were taken at incidence angles of 20, 60, and 85 degrees.
    • Calculations were performed for both unpolarized and partially polarized incident radiation.

    Main Results:

    • The gloss value of the black glass reference standard changes significantly with increasing polarization.
    • The gloss value of a sample, calculated as a ratio, is minimally affected by polarization.
    • This effect is particularly negligible when the sample's refractive index is close to that of the reference standard.

    Conclusions:

    • Gloss measurements using a black glass standard are robust against variations in incident radiation polarization.
    • The method is reliable even when measurements are taken near the Brewster angle of the reference.
    • The refractive index match between sample and reference further enhances measurement stability.