Question

what do you mean by refractive index? what is Snell's law​

Answer 1

Answer:

Snell's law is defined as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given pair of media”.

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Answer 2

Answer:

refractive index is the ratio of the velocity of light in a vaccum to its velocity in a medium...

Snell's Law=sin i/ sin r

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