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Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.
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Can a medium can have refractive index less than the reference refractive index (that is les...
Absolute refractive index of a medium is speed of light in vacuum / speed of light in in that medium.
This will always be greater than one as speed of light decreases as density increases and vacuum …