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Question: Answered & Verified by Expert
The refractive index of a prism measured using three lines of a mercury vapour lamp. If $\mu_{1}, \mu_{2}$ and $\mu_{3}$ are the measured refractive indices for these green, blue and yellow lines respectively, then
PhysicsRay OpticsKVPYKVPY 2013 (SA)
Options:
  • A $\mu_{2}>\mu_{3}>\mu_{1}$
  • B $\mu_{2}>\mu_{1}>\mu_{3}$
  • C $\mu_{3}>\mu_{2}>\mu_{1}$
  • D $\mu_{1}>\mu_{2}>\mu_{3}$
Solution:
1113 Upvotes Verified Answer
The correct answer is: $\mu_{2}>\mu_{1}>\mu_{3}$
$\mu(\lambda)=\mathrm{B}+\frac{\mathrm{C}}{\lambda^{2}}+\ldots$
$\mu_{2}>\mu_{1}>\mu_{3}$

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