dispersive power of prism why not depend upon size and angle of prism as the formula of dispersive power derive we use min.deviation=(μ-1)A is only applicable for small angle of pris

Q. The dispersive power of prism depends upon

Q. If a prism of dispersive power $0.021$ and refractive index $1.53$ forms an achromatic combination with a prism having the prism of angle ${4.2}^{\circ }$, dispersive power $0.045$ and refractive index $1.65,$ then what is the resultant deviation of the combination?

Q. Dispersive power of a prism decreases with the increase in prism angle.

Q. Prism angle of a prism is ${10}^{\circ }$. Refractive index for red and violet colour is 1.51 and 1.52 respectively. Then the dispersive power of the prism is

Q. Dispersive power of a prism______________ with the increase in prism angle.