21 In the case of a nephelometric comparison of two hyd

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21 In the case of a nephelometric comparison of two hydrosols, a sol with an average particle radius of 100⋅10-9 m with a beam width of 8⋅10-3 m had the same illumination of the field of view in the eyepiece as the tested sol on which a beam of light was incident through a slit of width 27⋅10-3 m. Determine the radius of the sol particle.

Additional information

Questions and problems from the manual:
"Laboratory Workshop on Colloid Chemistry" Nekrasov AP, Veretenchenko BA, Kharkov NTU "KhPI", 2004
"Characteristic properties of disperse systems" Nekrasov AP, Kharkov, 1996
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