Q22 of 29 Page 109

In what cases does a light ray not deviate at the interface of two media? (AS7)

A ray of Light does not deviate at interface of two media in two cases.

Case 1


When incidence ray strikes normally at the point of incidence. The figure below shows this.



Case 2


If the refractive indices of two media are equal.


That is n1 = n2 = n.


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