How can we define the dispersive power of a prism material?

Question

Gautham Pai M K · Answer

Dispersive power is the ratio of angular dispersion to the mean deviation. For example the dispersive powers of red light and violet light are as follows: dv-dr/(dv+dr/2)=nv-nr/(nv+nr/2)-1

hemanth · Answer

ans)The ratio of angular to mean deviation it is independent on angle of prism

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How can we define the dispersive power of a prism material?

How can we define the dispersive power of a prism material?

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