Question

Tyndall effect is not seen on the true solution why

Answer 1

A Pure or a True Solution will have particles totally dissolved in the substance having a Molecular Size less than 1 nanometer, whereas, the light to get scattered or dispersed it should be in the range of 1 nanometer to 1000 nanometer, making true or pure solutions unable to exhibit the phenomenon of Tyndall Effect.

$\boxed{DETAILED \quad EXPLANATION}$


Tyndall Effect cannot be performed or guaranteed to give a colloidal solution when it's mixing is done with sugar, or any other tiny matter capable enough to get dissolved easily.

For an exanple, Since, Sugar molecules or more specifically sucrose gets evenly dissolved in the water and makes it a $\textbf{Pure Solution}$ (Sucrose molecules are broken down in water into so small particulate matter it eventually vanishes from the solution). Since, the principles of Tyndall Effect work on Scattering of Light from the impurities present in a solution (colloidal solution to be specific), light rays are not going to get dispersed, so, no observation are made that it depicts the phenomenon of Tyndall Effect. Contrary, Tyndall Effect will be shown by milk when it has been diluted with water, hence, it will show signs of Tyndall Effect.


$\boxed{TYNDALL \quad EFFECT}$


$\textbf{John Tyndall}$ (Fellow of the Royal Society, a late 19th century physicist, rose to prominence by devising number of Experiments for the advancement if Human race) was the one who observed by observations and investigations of radiated heating source in a medium of Air should be neutralised by eliminating particulate matter which included, dust particles, water vapor, small microorganisms, etc. He used intensified light and projected it on air to be observable for seeing the particulate matter which evenly gets scattered around it, as, the impure mixtures or colloidal solutions get the light to get scattered, now coined and termed as, Tyndall Scattering Effect.

This is a special experiment which is performed in a dim or dark room with little to no light. After that the beam of light will enter the dim room making the dust particles surrounding the areas in the coming path visible to our naked eye, clear and clean.

The light or strong beam of light will follow through the passed path and enter into the path of colloidal or dispersed solution making different angles and hence can be viewed at different positions.

This strong beam of light will show up as a blurry or hazy beam or form a cone by the passing lens. Because of this the solution particulate matter will absorb this light beam or energy managing the light to emit itself in all the directions throughout the solution.

Light being mixed up in all directions and it's scattering is what is known to illuminate the light path of the beam in the colloidal projections and it's dispersed particle dispersion.

The methodology and the phenomenon of scattering of light in different directions or paths through a single strong bean by the medium or media of solution particles is regarded as Tyndall effects. Only colloidal solutions or the particles containing difference of dispersion can show this effect, any true solution with no mixture cannot exhibit the Tyndall effect.

This phenomenon has also been named as $\boxed{Willis-Tyndall \: \: Scattering}$ Effect which produces those dispersed light or small-looking dust particles oftenly seen in projection rooms in cinema halls, wavelength is approximated about 40 nanometers to 700 nanometers, if it comes in that range it will be a Tyndall Effect, whereas if it falls below the required minimum wavelength, it will be termed as $\boxed{Rayleigh's \: \: Scattering \: \: Effect}$.

Examples to illustrate by the methodology given as a experiment to observe Tyndall Effect will include some of these.

One Example would be to create a diluted colloidal Milk solution by adding at least half cup of water for spacing between the molecules in the colloid, this makes the scattering of the light inside the solution ultimately illuminating the whole colloidal solution with dust-like dispersed particles being visible to the naked eye. A skimmed or unpure milk can be used since it will contain some additional not required solutions and solutes.

Second example will be to produce a substance presented with high amounts of gelatinous mixtures, here, a projecting laser is pointed onto the substance with gelatin. Further on, gelatinous substance will exhibit the phenomenon of Tyndall Effect when it's equal projection is done throughout a glass containing the gelatinous colloidal dispersed solution, same goes for salt being dissolved into water to provide a hazy or colloidal solution for another excellent demonstration.

Answer 2

Hlo...

HERE IS UR ANSWER...

Tyndall effect is not seen on the true solution because in true solution all particle are dissolved completely and their size is less than 1 nanometer that's why tyndall effect is not seen in Colloidal solution.

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