For a medium,the refractive indices for violet,red,and yellow light are $1.62$,$1.52$,and $1.55$ respectively. Calculate the dispersive power of the medium.

Compare the dispersive powers of two prisms if one of them deviates the blue and red rays through $10^{\circ}$ and $6^{\circ}$ respectively,and the second prism through $8^{\circ}$ and $4.5^{\circ}$.

The refractive index of flint glass for blue $F$ line is $1.6333$ and red $C$ line is $1.6161.$ If the refractive index for yellow $D$ line is $1.622,$ the dispersive power of the glass is

The refractive indices of red,yellow,and violet colors for a prism are $1.5140, 1.5170$,and $1.5318$ respectively. Calculate the dispersive power of this prism. For a second prism,the refractive indices for red,yellow,and violet colors are $1.6434, 1.6499$,and $1.6852$ respectively. Calculate the dispersive power of the second prism.

Dispersive power depends on the following:

The deviations caused in red,yellow,and violet colors for a crown glass prism are $2.84^\circ$,$3.28^\circ$,and $3.72^\circ$ respectively. The dispersive power of the prism material is: