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The Tyndall effect is the scattering of light by a colloid or an extremely tiny solution of particles. It is also known as the Tyndall phenomenon and is similar to Rayleigh scattering, in that the intensity of the scattered light is inversely proportional to the wavelength’s fourth power, with blue light being scattered far more intensely than red light.

On the other hand, the Tyndall effect is caused by particles of the same size as the wavelength of light, whereas Rayleigh scattering is caused by particles much smaller than the wavelength of light. The British physicist John Tyndall, who conducted the initial and in-depth studies of this effect, is honored with its name.