• Shashi Kumari
• Dr. Amarendra Narayan

Abstract: A simple, low-cost and high precision method of measuring the refractive index of water using Michelson interferometer in temperature range 38 to 72oC is reported in this paper,. The aim of the present study was to measure the variation of refractive index of water with temperature. An Arduino UNO microcontroller based data acquisition system was designed and constructed for data gathering. The data was sent to a desktop computer for storage and offline analysis. The system is able to detect relative changes in refractive index of the order of 10-4. The set of values generated through our measurements agreed with other measurements within 10-3 and with the standard values as tabulated in Lange’s Handbook of Chemistry within 0.1%.

Keywords: Michelson interferometer, temperature dependence, Refractive index, Arduino UNO microcontroller, refractive index

"Temperature Dependence of Refractive Index of Water Measured with a Microcontroller Based Optical Interferometric System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.126-130, August-2020, Available :http://www.jetir.org/papers/JETIR2008320.pdf

"Temperature Dependence of Refractive Index of Water Measured with a Microcontroller Based Optical Interferometric System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp126-130, August-2020, Available at : http://www.jetir.org/papers/JETIR2008320.pdf