Question

The correct curve between refractive index n and wavelength A will be

• A. A
• B. D
• C. B
• D. C

Answer 1

The correct option is A A

Cauchy's relation gives the relationship between refractive index and wavelength

$n\left(\lambda \right)=B+\frac{C}{{\lambda }^2}$

So as wavelength increases, refractive index decreases in 2nd order.

Curve A shows this relation

Answer. A