Question

A glass slab has the left half of refractive index n1, and the right half of n2=3n1 . The effective refractive index of the whole slab is?

Answer 1

Answer:

(3/2) * n1

Explanation:

Total time taken to travel distance x.

(x/2n₁) + (x/2n₂) =( x/$n_{effctive}$)

n2 = 3n1

n_{effctive} = (3/2)*n1