tyndall effect

Tyndall beam

noun Physical Chemistry.
the visible path of light produced by the scattering action (Tyndall effect) of the particles in a colloidal solution on a beam of light passed through it.

Origin:
named after J. Tyndall

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World English Dictionary
Tyndall effect (ˈtɪndəl)
 
n
the phenomenon in which light is scattered by particles of matter in its path. It enables a beam of light to become visible by illuminating dust particles, etc
 
[C19: named after John Tyndall (1820--93), Irish physicist]

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