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define refractive index and write the carecterstics of refractive index

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Refractive index:-

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. ... Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.

Characteristics:-

The ratio of speed of light in vacuum to its speed in a specific medium. The speed of light in a medium depends on the properties of the medium. ... The more optically dense material is, the slower the speed of light. One such indicator of the optical density of a medium is the refractive index.

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Refractive index:-

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define refractive index and write the carecterstics of refractive index