Figure 7. The refractive index (n) of the Solochrome Dark Blue dye - doped polymer film versus the incident photon energy (hν), for different dye concentrations

From

Investigation of Optical Properties of Solochrome Dark Blue Dye Doped Polymer Films

Imad Al - Deen Hussein Ali Al - Saidi, Raghad Jabar

Journal of Materials Physics and Chemistry. 2017, 5(1), 32-38 doi:10.12691/jmpc-5-1-4