Question

define refractive indx of a medium how does it help of determine angle of refraction​

Answer 1

Answer:

Refractive index of a material is the ratio of the velocity of light in vacuum to the velocity of light in the given medium.

According to Snell's Law,

$n = \frac{ \sin(i) }{ \cos(r) } \\ where \: i \: is \: the \: angle \: of \: incdence \\\: and \: r \: is \: the \: angle \: of \: refraction$

therfore by knowing angle of incidence and refractive index of material we can find the angle of refraction.

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