In turbidity measurements, NTU is a unit used to express what property?

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Multiple Choice

In turbidity measurements, NTU is a unit used to express what property?

Explanation:
Turbidity is quantified by how much light is scattered by suspended particles, and NTU is tied to the nephelometric method. In nephelometry, light is shone into a sample and the amount of light scattered at a 90-degree angle is measured. The more scattering, the cloudier the sample, so the higher the turbidity reading. NTU, the Nephelometric Turbidity Unit, is calibrated against a standard (Formazin) to give comparable results. So this unit specifically expresses turbidity using the light-scattering nephelometric technique. The other terms are not standard units for turbidity and one of them refers to a medical field entirely unrelated.

Turbidity is quantified by how much light is scattered by suspended particles, and NTU is tied to the nephelometric method. In nephelometry, light is shone into a sample and the amount of light scattered at a 90-degree angle is measured. The more scattering, the cloudier the sample, so the higher the turbidity reading. NTU, the Nephelometric Turbidity Unit, is calibrated against a standard (Formazin) to give comparable results. So this unit specifically expresses turbidity using the light-scattering nephelometric technique. The other terms are not standard units for turbidity and one of them refers to a medical field entirely unrelated.

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