What is refractive index........answer my question☺

1.	What is refractive index........answer my question☺
Answer» Ratio of speed of light in vaccum to it\'s speed of light in mediu m. Refractive index is defined as the ratio of speed of light in vaccum to the speed of light in the medium. See in book Refraction of light is the phenomenon of bending of light from its original path on entering another media.

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