Tyndall effect
Tyndall Effect
The Tyndall Effect (pronounced: /ˈtɪndəl ɪˈfɛkt/), also known as Tyndall Scattering, is a phenomenon in Physics named after the 19th-century physicist John Tyndall.
Etymology
The term "Tyndall Effect" is derived from the name of its discoverer, John Tyndall, an Irish physicist known for his extensive work in the field of light scattering.
Definition
The Tyndall Effect refers to the scattering of light by particles in a colloid or in a very fine suspension. This effect is visible when light passes through a medium with many small particles suspended in it, such as in the atmosphere or in a solution of milk and water. The scattered light is mainly at blue and green frequencies, which is why the sky appears blue.
Related Terms
- Rayleigh Scattering: A type of scattering that occurs when the particles causing the scattering are much smaller than the wavelength of the light. This is the primary reason for the blue color of the daytime and twilight sky, as the short blue wavelengths are scattered more than the red.
- Colloid: A type of homogeneous mixture in which the dispersed particles do not settle out over time and are not readily filtered.
- Suspension (chemistry): A heterogeneous mixture that contains solid particles sufficiently large for sedimentation.
See Also
External links
- Medical encyclopedia article on Tyndall effect
- Wikipedia's article - Tyndall effect
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