In the present work, the dispersion of light at 3030K in Cholesteric liquid crystal(CLC), Polymer dispersed CLCs and nanopowder dispersed CLC as well as PDCLCs is studied using multiple wavelength refractometer. The variation of the refractive index of a medium with wavelength constitutes the phenomenon of dispersion. In Cholesteric Liquid Crystals a twist is superimposed on the usual parallel arrangement of molecular associations. A Polymer-dispersed Cholesteric liquid crystal (PDCLC) film is polymer film with embedded CLC droplets. The Ferroelectric nanoparticles dispersed at a low concentration in a CLC induce realignment of neighbouring Liquid crystal molecules. We observed that the dispersion increases in the mixtures of CLCs than in the pure CLC. Doping CLC with monomer or low concentration of ferroelectric nano – powder can thus modify the characteristics of CLCs, which plays an important role in the designing of new materials.The value of dispersion reaches maximum for PDCLC 1: CLC+M1.These are the promising material for various electro-optical devices, where light modulation is required.
