Abstract
Refractive index or index of refraction is an important physiochemical property of an optical medium. Here we report its value for sugar solution of various concentrations (0%, 5%, 10% and 20%) using the Newton’s rings set up for yellow light from sodium lamp (λ=5893Å). Newton’s Rings are an interference pattern generated via division of amplitude principle. The set-up used in our study is easily available in an undergraduate laboratory. The study correctly presents effect of increasing number of particles in a liquid on its refractive index. KEY WORD: Newton’s Rings, refractive index, interference and sugar solution.
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