Question

if the refractive index of diamond is 2.42 and the velocity of the light in diamond ( c=3×108 m/s)

Answer 1

refractive index = speed of light in air/speed of light in diamond

2.42= speed of light in air/3×10to the power 8

spedd of light = 3×10 to the power 8 m/s

Answer 2

$the \: refractive \: index \: of \: diamond \: is \: 2.42 \\ the \: velocity \: of \: the \: light \: indiamond \: (c = 3 \times 108m | s) \\ \\ cost \: of \: velocity324m | s \\ cost \: of \: diamond2.24 \\ 2.664 \: \: ans$