Physics - Geometrical Optics Question with Solution | TestHub

The speed of light in media $\text{'}A\text{'}$ and $\text{'}B\text{'}$ are $2.0\times {10}^{10} \mathrm{cm} {\mathrm{s}}^{-1}$ and $1.5\times {10}^{10} \mathrm{cm} {\mathrm{s}}^{-1}$ respectively. A ray of light enters from the medium $B$ to $A$ at an incident angle$\text{'}\theta \text{'}$. If the ray suffers total internal reflection, then