Optical characterisation of polarised light beam under different aqueous concentrations



Optical activity, Chiral molecule, Optical filters, Polarised light, Wavelength, Sugar concentration


In this study, the optical activity of salt, brown and white sugar solutions of different concentrations is determined. The optical rotation angle as a function of wavelength was studied using different optical color filters. Sodium-D light and laser source of light were used. The optical activity was found to depend on the type of sugar, sugar concentration and the wavelength of the light used. The study revealed that the optical activity was linearly dependent on the concentration of the sugar solution (both white and brown). Cyan light recorded the highest angle of rotation while red light recorded the lowest. It also found that brown sugar has a greater ability to rotate polarized light than white sugar due to the presence of potassium and magnesium components. It is worth noting that the salt solution is optically inactive because it lacks microscopic mirror symmetry. Finally, the findings provide an understanding of the characteristics of polarized light under different solution concentrations and can serve as a guide for conducting further research on high-efficiency polarizers.


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Author Biographies

Michael Gyan, University of Education, Winneba

Department of Physics Education, Lecturer

Kwesi , University of Education, Winneba

Department of Physics Education, Lecturer

Fortune Addo-Wuver , University of Education, Winneba

Department of Physics Education, Lecturer


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Figure 1. Experimental set-up for determination of the angle of rotation for different sugar solutions




How to Cite

D. Appiah, V. . Antwi, M. . Gyan, I. . Acquah, and F. . Addo-Wuver, “Optical characterisation of polarised light beam under different aqueous concentrations”, International Journal of Engineering and Applied Physics, vol. 3, no. 2, pp. 799–804, May 2023.