A) total internal reflection takes place
B) it passes undeviated
C) it undergoes dispersion
D) it gets absorbed by the surface
Correct Answer: B
Solution :
From Hugen's principle, if the incident wave front be parallel to the interface of the two media \[(i=0),\] then the refracted wave front will also be parallel to the interface \[(r=0).\] In other words, if light rays fall normally on the interface, then on passing to the second medium they will not deviate from their original path.
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