Measurement of the effective refractive index of a turbid colloidal suspension using light refraction

Details Measurement of the effective refractive index of a turbid colloidal suspension using light refraction Measurement of the effective refractive index of a turbid colloidal suspension using light refraction

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005njph....7...89r&link_type=abstract

New Journal of Physics, Volume 7, Issue 1, pp. 89 (2005).

Physics

4

Scientific paper

We propose and analyse a simple method to measure simultaneously the real and imaginary parts of the effective refractive index of a turbid suspension of particles. The method is based on measurements of the angle of refraction and transmittance of a laser beam that traverses a hollow glass prism filled with a colloidal suspension. We provide a comprehensive assessment of the method. It can offer high sensitivity while still being simple to interpret. We present results of experiments using an optically turbid suspension of polystyrene particles and compare them with theoretical predictions. We also report experimental evidence showing that the refractive behaviour of the diffuse component of light coming from a suspension depends on the volume fraction of the colloidal particles.

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