Question

f the refractive index of an medium is 7/2. What will its speed ? (in x10⁸ m/s) ans​

Answer 1

Answer:

8.6 × 10^7

Explanation:

refractive index n = speed in vacuum / speed in medium

7/2 = 3×10^8 / speed in medium

speed in medium = 3×10^8 ×2/7 = 6/7 ×10^8 = 8.6 × 10^7