Abstract
We have measured the refractive index of water as a function of temperature with home-made precision goniometer printed in Graphic Art Film having the resolution of ±0.02°. Experimental results of the refractive index of water in various temperatures agree with the published values and have the uncertainty of ±∼× within the 95 % confidence interval. By applying the home-made goniometer to experiment class, A student can measure the refractive index of water easily and precisely.
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