Question

how path of light become visible when it passes through a beaker having sand in water​

Answer 1

Answer:

Beaker A will show a path of light (It's a colloidal solution /Heterogeneous mixture). This is because it is the emulsion of milk and water which shows the Tyndall effect.

Beaker A will show a path of light (It's a colloidal solution /Heterogeneous mixture). This is because it is the emulsion of milk and water which shows the Tyndall effect.Beaker B will not show path of light. (It's a homogenous solution) Visibility of light in a mixture is known as Tyndall effect. (And the path is visible because large molecules of heterogeneous mixture deviate the path of light to make it visible)