Let the \[x-y\] plane be the boundary between two transparent media. Medium 1 in \[z\ge 0\] has refractive index of \[\sqrt{2}\] and medium 2 with \[z

• A. \[{{30}^{o}}\]
• B. \[{{45}^{o}}\]
• C. \[{{60}^{o}}\]
• D. \[{{75}^{o}}\]