Question

When light is incident on a glass slab, the incident ray, refracted ray and the emergent ray are in three media A, B and C. If n1,n2and n3 are the refractive indices of A, B and C respectively and the emergent ray is parallel to the incident ray, which of the following is true ?
a) n1<n2<n3
b) n1<n2= n3
c) n1>n2>n3
d) n1=n3<n2

Answer 1

Answer:

As the incident light is normal to the surface thus the incidence angle will be zero which will correspond to zero degree refracted angle and zero degree emergent angle.

Explanation:

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