Find the dispersive power of flint glass. The refractive indices of flint glass for red, yellow and violet lights are $1.613,1.620$ and $1.632$ respectively.

Q. Define the dispersive power of an optical medium. Refractive indices for violet, yellow and red colours of light are respectively $1.632,1.620,1.613$ for flint glass. Find the dispersive power of the material of flint glass.

Q. The refractive indices of flint glass for red and violet lights are $1.613$ and $1.632$ respectively. Find the angular dispersion produced by a thin prism of flint glass having refracting angle $5^{\circ }$.

Q.

If the refractive indices of crown glass for red, yellow and violet colours are 1.5140. 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive power for crown and flint glass are respectively:

Q. A crown glass prism of angle $5^{\circ }$ is to be combined with a flint glass prism in such a way that the mean ray passes undeviated. The angle of flint glass prism is $A^{\prime }$ and angular deviation produced by the combination when white light goes through it is $\delta$. Refractive indices for red, yellow and violet light are $1.514,1.517$ and $1.523$ respectively for crown glass and $1.613,1.620$ and $1.632$ for flint glass. Then :

Q. If the refractive indices of crown glass for red, yellow and violet colours are $1,5140,1.5170$ and $1.5318$ respectively and for flint glass these are $1.6434,1.6499$ and $1.6852$ respectively. then the dispersive powers for crown and flint glass are respectively.