Question

What is refractive index?​

Answer 1

`\huge \mathbb \red{HEY \: THERE ♡}`

Refractive Index:

• The ratio of the sine of angle of incidence to the sine of angle of refraction in case of lens for light of a given colour and given pair of media is constant.

• Note** It is also called Snell's Law of Refraction.
• 
  `\mathsf \orange{(sine \: i)/(sine \: r) = constant}`

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