(n1/n2) = (sinθ2/sinθ1) = (v2/v1) = (λ2/λ1)
.
Medium 1 refractive index = n1
Medium 2 refractive index = n2
.
Snell's law of refraction states:
n1Sinθ1 = n2Sinθ2
.
For a light ray travelling from air into a transparent substance:
refractive index (n) = sini/sinr (i = incidence, r = reflected)
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