Final answer:
The turbidity can be matched against known standards like the 0.5 McFarland standard commonly used in microbiology for bacterial suspensions.
Step-by-step explanation:
The question appears to involve the concepts of turbidity standards which are used in chemistry to measure the clarity of solutions and ascertain the concentration of colloidal or suspended particles within a solution. These standards can be based on various substances such as calcium carbonate, milk, starch solution, and acrylic particles.
A colloidal solution is characterized by particles sized between 1 and 200 millimicrons. When light is passed through a colloidal solution, the Tyndall effect can be observed which scatters light and gives the solution a murky appearance. Preparing standards involves matching the turbidity to known references such as the 0.5 McFarland standard, which is commonly used in microbiological practices when preparing bacterial suspensions.