•Polarizability (a) is measure of how
well a given frequency
induces a dipole in a substance
aTends to be large for large
molecules (e.g., proteins)
a
aLarge Particle Scattering – particle dimensions < 10 % λ to 1.5 λ
aApplies in techniques like
turbidimetry and nephelometry
aLarge particles do not act as a point source & give rise to various interference
phenomena
aForward scatter becomes
greater than back scatter