Computer · Environmental Engineering
Turbidity in water using a modern nephelometer is measured by the:
- 1Difference in suspended solid concentration before and after filtration
- 2Concentration of colloidal and suspended solids after sedimentation
- 3Concentration of suspended solids collected after centrifuging
- 4Intensity of light scattered at 90 degrees when light is passed through it✓
Correct answer
Intensity of light scattered at 90 degrees when light is passed through it
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