Question

What is the speed of light in diamond?

Answer 1

v= speed of light in diamond. 2.42=c/v so v=c/2.42, c≈3x108 m/sec so v=1.24x108 m/sec.

Answer 2

Refractive index = 2.42

Light speed = 3× 10^8

So by the formula

n = c/ v

Find diamond speed