Question

In what case a light ray doesn't deviate at interface of two media?​

Answer 1

Answer:

A ray of Light does not deviate at interface of two media in two cases. When incidence ray strikes normally at the point of incidence. The figure below shows this. If the refractive indices of two media are equal.

Answer 2

Explanation:

when incident ray falls normally ,it does not deviate from its path while passing through the different media.