If the refractive indices of a prism for red, | vedclass

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(C) The dispersive power $\omega$ of a prism is defined as the ratio of the angular dispersion between the extreme colours (violet and red) to the mea

Vedclass · Accepted Answer

$\frac{1.65 - 1.61}{1.63 - 1}$

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(C) The dispersive power $\omega$ of a prism is defined as the ratio of the angular dispersion between the extreme colours (violet and red) to the mean deviation produced by the prism.Mathematically,$\omega = \frac{\mu_V - \mu_R}{\mu_Y - 1}$,where $\mu_V$,$\mu_R$,and $\mu_Y$ are the refractive indices for violet,red,and yellow colours respectively.Given: $\mu_R = 1.61$,$\mu_Y = 1.63$,and $\mu_V = 1.65$.Substituting these values into the formula:$\omega = \frac{1.65 - 1.61}{1.63 - 1}$.Thus,the correct option is $C$.

If the refractive indices of a prism for red,yellow,and violet colours are $1.61$,$1.63$,and $1.65$ respectively,then the dispersive power of the prism will be:

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