MCQ
The Cauchy's dispersion formula is
- ✓$n=A+B \lambda^{-2}+C \lambda^{-4}$
- B$n=A+B \lambda^2+C \lambda^{-4}$
- C$n=A+B \lambda^{-2}+C \lambda^4$
- D$n=A+B \lambda^2+C \lambda^4$
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