Question

If $_i\mu_j$ represents refractive index when a light ray goes from medium i to medium j, then the product $_2\mu_1 \times _3\mu_2 \times _4\mu_3$ is equal to
(a) ₃μ₁
(b) ₃μ₂
(c) $\frac{1}{_1\mu_4}$
(d) ₄μ₂

Answer 1

4u2 is the answer of these question