engineering recuitment GATE IN Test Series 2023-24 Mock Test Electromagnetic Theory Electromagnetic Wave Propagation Plane Wave At Oblique Incidence
A Transparent solid cylindrical rod has a refractive index of 2/√3. It is surrounded by air. A light ray is incident at the midpoint of one end of the rod a shown.
The incident angle θ for which the light rag grazes along the wall of the rod is.1
\({\sin ^{ - 1}}\left( {\frac{1}{2}} \right)\)
2
\(si{n^{ - 1}}\left( {\frac{{\sqrt 3 }}{2}} \right)\)
3
\(si{n^{ - 1}}\left( {\frac{2}{{\sqrt 3 }}} \right)\)
4
\({\sin ^{ - 1}}\left( {\frac{1}{{\sqrt 3 }}} \right)\)