The refractive angles of two crown glass prisms are `10^(@)` and `20^(@)` respectively . What is the ratio of their dispersive the material of the same prism then

If the refractive angles of two prisms made of crown glass are 10^(@) and 20^(@) respectively, then the ratio of their colour deviation powers will be

The refractive indices of crown glass prism of C,D and F lines are 1.527, 1.530 and 1.535 respectively. Find the dispersive power of the crown glass prism.

The refractive indices of crown glass prism of C,D and F lines are 1.527, 1.530 and 1.535 respectively. Find the dispersive power of the crown glass prism.

The deviation caused for red, yellow and violet colours for crown glass prism are 2.84^(@),3.28^(@) and 3.72^(@) respectively. The dispersive power of prism material is:

The deviation caused for red, yellow and violet colours for crown glass prism are 2.84^(@),3.28^(@) and 3.72^(@) respectively. The dispersive power of prism material is:

The respective angles of the flint and crown glass prisms are A' and A. They are to be used for dispersion without deviation, then the ratio of their angles A'//A will be

In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are omega, omega^(‘) and d, d^(‘) respectively. The condition of getting dispersion with zero deviation, when the two prisms are combined is