NCERT Solution: Light Reflection and Refraction

Short Answer Type

How is the refractive index of a medium related to the speed of light? Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media?

Refractive index of one medium in relation to a second medium is given by ratio of speed of light in second medium to speed of light in first medium. If v1 is the speed of light in first medium and v2 is the speed of light in second medium, then refractive index of first medium in relation to second medium can be given as follows:

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