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Dispersion of Light
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The angles of minimum deviations are 53$^{\circ}$ and 51$^{\circ}$ for blue and red colors respectively produced in an equilateral glass prism. The dispersive power is :
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A
$\dfrac{1}{26}$
💡 Explanation:
As $\delta _{Y}=\dfrac{\delta _{B}+\delta _{R}}{2}$
So $\delta _{Y}=\dfrac{53^{\circ }+51^{\circ }}{2}$ =52$^{\circ }$
$\therefore dispersive\ power\ =\dfrac{\delta _{B}-\delta _{R}}{\delta _{Y}}$
$=\dfrac{53-51}{52}$
$=\dfrac{2}{52}$
$=\dfrac{1}{26}$