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(a) Measurement scheme; (b) Light interaction with Brownian particles; (c) Typical time-of-flight (TOF) distribution for a pulsed light source (upper axis), and corresponding power spectrum in the frequency domain (lower axis), is the frequency offset due to the heterodyne interferometer scheme; (d) Power spectrum of the Brownian motion of singly scattered light; is the FWHM.
Recorded power spectra of colloidal suspension samples with different Intralipid and Indian ink concentrations. The dashed lines are the fittings of the power spectra according to Eq. (2) .
Values of (a) the reduced scattering coefficients ( ) and (b) the absorption coefficients ( ) for batch A and B, respectively. The dashed lines are the corresponding linear fits.
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