Question

define refractive index​

Answer 1

Answer:

In optics, the refractive index of a material is a dimensionless number that describes how fast light travels through the material. It is defined as n={\frac {c}{v}}, where c is the speed of light in vacuum and v is the phase velocity of light in the medium.

Formula

Formulan=\frac{c}{v}

Formulan=\frac{c}{v}n = refractive index

Formulan=\frac{c}{v}n = refractive index{c} = speed of light

Formulan=\frac{c}{v}n = refractive index{c} = speed of light{v} = phase velocity of light

Explanation:

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Answer 2

Answer:

Refractive Index (Index of Refraction) is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly symbolized by the letter n or n' in descriptive text and mathematical equations.