What is absolute refractive Index? Give formula to calculate refractive
index. Give Snell's law.*
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It is defined as the ratio of the speed of light in vacuum or air to the speed of light in the medium.
Snell's law is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass.
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