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The light that is scattered by particles in the unknown solution is measured and made as a basis of determining its concentration.
Factors affecting the amount of light scattered are:
a.the wavelength used – dispersion of light is inversely proportional to the
b.the size of the particles
c.the amount of particles in solution
d.the cross sectional area of the particles
e.the source of light - monochromatic lights give more reliable readings because they
minimize sample heating and have more stable readings.