Nephelometry is based on the principle of -: (A) Light attenuated in intensity by scattering, (B) Refraction of light, (C) Reduced transmission of light, (D) Filtration of solutes by kidney
Answer is A. Both nephelometry and turbidimetry methods are based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering.
In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured.
In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.