The Velocity of light in a diamond is (whereas the refractive index of a diamond with respect to vacuum is 2.5)...? Mcqs

The Velocity of light in a diamond is (whereas the refractive index of a diamond with respect to vacuum is 2.5)...?

(A) 5x10^8m/s

(B) 2.5x10^8m/s

(C) 1.2x10^10m/s

(D) 1.2x10^8m/s