MCQOPTIONS
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MCQOPTIONS
| 1. |
In the figure shown, for an angle of incidence \[{{45}^{o}},\] at the top surface, what is the minimum refractive index needed for total internal reflection at vertical face [DCE 2002] |
| A. | \[\frac{\sqrt{2}+1}{2}\] |
| B. | \[\sqrt{\frac{3}{2}}\] |
| C. | \[\sqrt{\frac{1}{2}}\] |
| D. | \[\sqrt{2}+1\] |
| Answer» C. \[\sqrt{\frac{1}{2}}\] | |