what is tyndall effect?
The Tyndall effect, also known as Tyndall scattering, is light scattering by particles in a colloidor 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 more strongly than red light. An example in everyday life is the blue colour sometimes seen in the smoke emitted by motorcycles, particularlytwo stroke machines where the burnt engine oil provides the particles. .