Authors : Mohammed H.K. AL-Mamoori, Saif M. AL-Sharify, Mohammed J. Jader and Amer AL-Nafiey
Abstract: This research aims to design a simple and low cost refractometer by applying Beer’s Lambert Law. It contains two parts: part one, the refractive index of water was calculated by using a He-Ne laser, Diode-Pumped Solid-State Lasers (DPSSL) with different wavelengths and semiconductor laser operating at second harmonic generation were used to compute the refractive index of water. The refractometer (Type Zei 13743, Germany) was used to compute the refractive index directly, then the comparison between these measurements and find the percentage errors in measurements of refractive index. The second part, He-Ne laser was used to compute the refractive index of the following liquids: gas oil, benzene (C6H6) and kerosene, then refractometer was used, so as to calculate the refractive index of these liquids directly and comparison between these measurements, then the percentage errors were found. The relationship between absorbance, refractive index, reflectance, percentage error and transmittance as a function of wavelength and between refractive index and percentage error for pure water has been studied. The results shows the refractive index can be calculated by any type of laser (in visible and IR region) by applying Beer’s Lambert Law. It is applied to calculate the refractive index for cold, hot, toxic and non-toxic liquids.
Mohammed H.K. AL-Mamoori, Saif M. AL-Sharify, Mohammed J. Jader and Amer AL-Nafiey, 2018. Design a Simple Refractometer to Calculate the Refractive Index of a Transparency Liquid Using Beer’s Lambert Law. Journal of Engineering and Applied Sciences, 13: 10967-10971.