Question

prove n21=n2/n1 and say is it correct or not​

Answer 1

Answer:

sin i / sin r

n21 = v1/v2 = c/n1x n2/c = n2/n1

Explanation:

The refractive index of medium 2 with respect to medium 1 is :μ21 = μ21 = μ2μ1

Answer 2

n1 = c/v1

i.e. v1= c/n1 .........(1)

n2 = v/V2

i.e V2= c/n2........(2)

so,

n21= v1/V2

from (1) and (2)

n21= c/n1/c/n2

n21= c/n1×n2/c

hence,

n21 = n2/n1.

proved