Question

what is the cause of tyndaal effect? ​

Answer 1

Answer:

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Explanation:

TYNDALL EFFECT :

The Tyndall effect is light scattering by particles in a colloid or in a very fine suspension. Also known as Tyndall scattering, it is similar to Rayleigh scattering, in that the intensity of the scattered light is inversely proportional to the fourth power of the wavelength, so blue light is scattered much more strongly than red light. An example in everyday life is the blue colour sometimes seen in the smoke emitted by motorcycles, in particular two-stroke machines where the burnt engine oil provides these particles.

Under the Tyndall effect, the longer wavelengths are more transmitted while the shorter wavelengths are more diffusely reflected via scattering. The Tyndall effect is seen when light-scattering particulate matter is dispersed in an otherwise light-transmitting medium, when the diameter of an individual particle is the range of roughly between 40 and 900 nm, i.e. somewhat below or near the wavelengths of visible light (400–750 nm).

It is particularly applicable to colloidal mixtures and fine suspensions; for example, the Tyndall effect is used in nephelometers to determine the size and density of particles in aerosols and other colloidal matter (see ultramicroscope and turbidimeter).

It is named after the 19th-century physicist JOHN TYNDALL.

Answer 2

Answer:

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Explanation:

The earth's atmosphere is a heterogeneous mixture of minute particles.

These particles include smoke, tiny water droplets, suspended particles of dust and molecules of air. When a beam of light strikes such fine particles the path of the beam becomes visible. The light reaches us after being reflected differently by these particles.

The phenomenon of scattering of light by the colour particles give rise to Tyndall effect .

This phenomenon is seen when fibe beam of sunlight enters a smoke filled room through a small hole.

The scattering of light make the particle visible tyndall effect can also be observed when sunlight passes through a canopy of a dense forest. Here tiny water droplets in the mist scatter light .

The colour of the scattered light depends on the size of the scattering particles .Very fine particles scatter mainly blue light while particles of the larger size scatter lights of longer wavelengths .

If the size of the scattering particles is large enough then the scattered light me even appear white.