✔ Correct Answer: D. 1.2x10^8m/s

The correct answer to the question “The Velocity of light in a diamond is (whereas the refractive index of a diamond with respect to vacuum is 2.5)?” is 1.2x10^8m/s. This question belongs to Everyday Science. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.