Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

If μr represents the refractive index for red light and μv represents refractive index for violet light, then which of the following is true?

Options:

μr > μv

μr < μv

data insufficient.

μ= μv

Correct Answer:

μr < μv

Explanation:

From Cauchy relation $\mu = A + \frac{B}{\lambda^2}$

Since $ \lambda_r > \lambda_v$

$\Rightarrow \mu_v> \mu_r$