
Light passing through a colloid is scattered by suspended particles. The light beam becomes clearly visible; this phenomenon is called the Tyndall effect. For example, car headlight beams can be seen in fog, but the beams are invisible in clear air.
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http://antoine.frostburg.edu/chem/senese/101/glossary/t.shtml

The Tyndall effect, also known as Tyndall scattering, is light scattering by particles in a colloid or particles in a fine suspension. It is named after the 19th-century physicist John Tyndall. It is similar to Rayleigh scattering, in that the intensity of the scattered light depends on the fourth power of the frequency, so blue light is scattered...
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http://en.wikipedia.org/wiki/Tyndall_effect

(from the article `coloration`) A special instance of diffraction, often referred to as the Tyndall effect (after its discoverer, the 19th-century British physicist John Tyndall), ... For chemical analysis three forms of radiative scattering are importantnamely, Tyndall, Raman, and Rayleigh scattering. Tyndall scattering occurs .....
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http://www.britannica.com/eb/a-z/t/99

The scattering of light by colloidal particles.
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http://www.chemistry-dictionary.com/definition/tyndall+effect.php

The scattering of light by colloidal particles.
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http://www.encyclo.co.uk/local/20728

Synonym for Tyndall phenomenon ... The visibility of floating particles in gases or liquids when illuminated by a ray of sunlight and viewed at right angles to the illuminating ray. ... Synonym: Tyndall effect. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: tin′dĕl Synonyms: Tyndall phenomenon
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http://www.medilexicon.com/medicaldictionary.php?t=28051

The Tyndall Effect is the scattering of light by fine suspended particles. If a beam of white light is passed through a colloidal suspension of a substance such as mastic in water, light will be emitted at right angles to the beam.
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http://www.probertencyclopaedia.com/browse/GT.HTM

[
n] - the phenomenon in which light is scattered by very small particles in its path
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http://www.webdictionary.co.uk/definition.php?query=Tyndall%20effect

See under Louche-effect. Louche-effect Term (french louche = opaque, disreputable, suspicious) for the milky taste of an aniseed spirit when water is added or when it is very strongly cooled. These are Absinthe, Pastis and Pernod (France), Aguardiente and Pacharán (Spain), Aquavit (Scandinavia), Arrak (East India),... Full text
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https://glossary.wein.plus/tyndall-effect

Light passing through a colloid is scattered by suspended particles. The light beam becomes clearly visible; this phenomenon is called the Tyndall effect. Examplecar headlight beams can be seen in fog, but the beams are invisible in clear air.
Found on
https://www.encyclo.co.uk/local/20687
noun the phenomenon in which light is scattered by very small particles in its path; it makes a beam of light visible; the scattered light is mainly blue
Found on
https://www.encyclo.co.uk/local/20974
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