Tyndall Effect|colloidal solution|Scattering of Light|Experiment|Demonstration|Animation|Examples.


didn’t affect objective to learn the
concept of Tyndall effect the Tyndall effect named after physicist John
Tyndall involves the scattering of light by finely suspended particles in some
things such as in colloid this effect is also referred to as Tyndall scattering let’s demonstrate the Tyndall effect
we’ll begin by filling all three beakers with the distilled water in the first
we’ll leave just the water in the second we will dissolve a spoonful of sugar and
in the other we’ll stir a few drops of milk
first we’ll shine through the beaker containing only the water although we
cannot see the light beam as it is passing through the water we’ll be able
to see it as it emerges unchanged from the other side now we’ll shine a laser
through the second beaker containing the sugar solution once again we cannot see
the beam as it passes through the solution but we are able to see it as it
emerges from the other side again unchanged finally we will shine our
laser through the third beaker which has milky water in this case we are able to
clearly see the light beam as a process through the liquid this appearance of a
light beam passing through a liquid is the result of Tyndall effect what is
happening to the light beam let’s take a closer look at what’s in each beaker so
that we’ll have a better understanding in distilled water any particles are too
small to obstruct the path of light as it passes through meaning we won’t be
able to see the beam a solution such as a sugar solution we
made with a homogeneous mixture made up of only one phase in this form the
solute in this case the sugar will dissolve in the solvent in this case the
water and take on the characteristics of the solvent meaning once again we won’t
be able to see the light hitting anything a colloid however has two
phases the dispersed phase which is the milk particles and the dispersion medium
which is the water in the colloid light will scatter in different directions due
to the dispersed particles but in water and in true solutions such as a sugar
solution it will pass through without being scattered the Tyndall effect is
used in identifying whether a liquid is a solution or of colloid summary the
Tyndall effect involves the scattering of light as it passes through a colloid
true solutions do not exhibit the Tyndall effect you

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