Can relative refractive index of a medium with respect to another medium be less than unity? If yes, give example.
Refraction Plane Surfaces
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Can relative refractive index of a medium with respect to another medium be less than unity? If yes, give example.

KnowledgeBoat · Accepted Answer

Yes, the relative refractive index can be less than 1 when light travels from a denser medium to a rarer medium. Refractive index of a medium is given by, In this case, the speed of light increases. For example, the refractive index of water with respect to glass is less than unity.

Physics

Can relative refractive index of a medium with respect to another medium be less than unity? If yes, give example.

Refraction Plane Surfaces

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