A spectrophotometer can be used to determine the turbidity by measuring absorbance.
The term absorbance has to do with the amount of light that can be taken in by a sample which can be used as a measure of concentration of of the bacterial numbers in a sample.
The absorbance can only be measured by the use of a spectrophotometer. Hence, a spectrophotometer can be used to determine the turbidity by measuring absorbance.
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