Question

When incident ray is along the Normal, then angle of Incidence is *​

Answer 1

Explanation:

Here, the ray incidents along normal so, From the figure, angle of incidence=0∘.

Answer 2

Explanation:

If the incident ray is on the same path as the normal to the surface, the angle of incidence will be zero. Therefore, the angle of incidence when light incident ray is along the normal to interface or boundary separating the two media is i=0 where i is the angle of incidence