Question

The correct curve between refractive index $\mu$ and wavelength $\lambda$ will be:

• A. A
• B. D
• C. B
• D. C

Answer 1

Answer: (A)

A

According to Cauchy's formula:
$\mu =A$+ ${\frac{B}{\lambda }}^2+......$
Therefore , as $\lambda$ increases, $\mu$ decreases.
So, curve A is correct.