C-09-Q015mediumsingle_mcqThe velocity of light in diamond (n = 2.42) is approximately —a3×1083 \times 10^83×108 ms⁻¹b2×1082 \times 10^82×108 ms⁻¹c1.24×1081.24 \times 10^81.24×108 ms⁻¹d0.66×1080.66 \times 10^80.66×108 ms⁻¹