Equation of ray of light in medium with variable refractive index using fermat's principle
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Mirage is a beautiful natural phenomena where a light ray coming down at an inclination to the vertical turns up side down due to gradient in refractive index. It can be easily demonstrated in a laboratory by making a salt solution with a concentration gradient. In this article, we describe our experiment on forming a Mirage like phenomena and analyze the path using Snell's law and also using Fermat's principal.
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