A light ray travelling in glass medium is incident on glass-air interface at an angle of incidence $\theta$. The reflected $\left(R\right)$ and transmitted $\left(T\right)$ intensities, both as functions of $Q$ are plotted. The correct sketch in Fig. $13.89$, is

In a pond of water, a flame is held $2 \mathrm{m}$ above the surface of water. A fish is at depth of $4 \mathrm{m}$ from water surface. Refractive index of water is $\frac{4}{3}.$ The apparent height of the flame from the eyes of fish is

A ray $OP$ of monochromatic light is incident on the face $AB$ of prism $ABCD$ near vertex $B$ at an incident angle of $60$, Fig. $13.90$. If the refractive index of the material of the prism is $\sqrt{3}$, which of the following is (are) correct?