Tyndall effect
Tyndall effect
(ˈtɪndəl)| Noun | 1. |  Tyndall effect - 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 |
| 单词 | tyndall effect | |||
| 释义 | Tyndall effectTyndall effect(ˈtɪndəl)
Tyndall effectTyndall effect:see colloidcolloid[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion. ..... Click the link for more information. . Tyndall Effectthe scattering of light that occurs when a light beam passes through an optically inhomogeneous medium. The Tyndall effect is usually observed as a luminous cone, which is called a Tyndall cone and is visible against a dark background. The effect is characteristic of colloidal systems, such as metalsols, thin latices, and tobacco smoke. The particles and dispersion medium in these systems have different refractive indexes. The Tyndall effect forms the basis for a number of optical techniques for determining the size, shape, and concentration of colloidal particles and macromolecules (see, for example, NEPHELOMETRY). The effect is named after its discoverer, J. Tyndall. Tyndall effect[′tind·əl i‚fekt]Tyndall effectTyn·dall phe·nom·e·non(tin'dĕl),Tyndall effectDermatology The change that light undergoes as it passes through a turbid medium–eg, skin, causing the colors of the spectrum to scatter; colors with a longer wavelength–red, orange and yellow tend to continue traveling forward while those with a shorter wavelength–blue, indigo and violet scatter to the side and backward; the TE explains why a subcutaneous lesion, which should have a red-brown hue due to hemorrhage or melanin deposition, has a blue tingeTyndall,John, English physicist, 1820-1893.Tyndall effect
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