Abstract
This research was conducted to determine the characteristics of changes in the light polarization angle of colloidal silver solution. The method used in this research is electro-optic polarization, the light source used is a green laser with a wavelength of 532 nm. Characteristics of changes in the polarization angle of light in colloidal silver solutions are obtained by varying the concentration of colloidal silver solutions (16.3 ppm, 8 ppm, 7.1 ppm, 4.6 ppm, 4.1 ppm, 3.4 ppm) and adding an electric field of 0-9 kV. The results showed that the addition when the concentration of colloidal silver solution caused a non-linear change in the angle of polarization. The highest changes in the polarization angle of light occurred at a concentration of 4.1 ppm and 4.6 ppm. The natural polarization method was carried out in this study to compare the results on electrooptic polarization. The results showed that the change in the angle of electrooptic polarization was greater than that of natural polarization. The addition of the electric field to electrooptic polarization results in the formation of electric dipoles in the solution which causes the change in the angle of electrooptic polarization to increase.
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