Measurement of the Bragg diffraction and thermal diffuse scattering from colloidal crystals consisting of aqueous suspensions of polystyrene spheres with and without strongly absorbing dye molecules show that dynamical diffraction theory is valid even for absorbing colloidal crystals. In addition, we show that thermal diffuse scattering from colloidal crystals may be described by the simple Debye model. We determine the effective penetration depth of the incident electric field for cases where the Bragg condition is satisfied.
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Rundquist et al. (1991) studied this question.