Relative Refractive Index

Figure shows a ray of light as it travels from medium $A$ to medium $B$. Calculate the refractive index of the medium $B$ relative to medium $A$.

Refractive index of diamond with respect to glass is $1.6$ and absolute refractive index of glass is $1.5$ Find out the absolute refractive index of diamond.

A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. Support your answer with reason. 

The refractive index of glass and water with respect to air are $3/2$ and $4/3$ respectively. What will be the refractive index of glass with respect to water?

Refractive index of water is $\frac{4}{3}$ and that of the glass is $\frac{3}{2}$ with regard to air. What is the refractive index of glass with respect to the water?

The refractive index of glass and water with respect to air are $\frac{3}{2}$ and $\frac{4}{3}$ respectively. What will be the refractive index of water with respect to glass?

A pond of depth $30 \mathrm{cm}$ is filled with water of refractive index $\frac{4}{3}$. Calculate apparent depth of the tank when viewed normally.

A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be:

Figure shows a ray of light as it travels from medium $A$ to medium $B$. Refractive index of the medium $B$ relative to medium $A$ is: