Wavelength(nm) n k 459.3 3.807 0 476.9 3.637 0 496 3.524 0 516.7 3.438 0 539.1 3.369 0 563.6 3.312 0 590.5 3.263 0 620 3.221 0 652.6 3.183 0 688.9 3.151 0 729.4 3.122 0 775 3.096 0 826.7 3.073 0 885.7 3.052 0 953.8 3.033 0 1033.3 3.017 0 1127.3 3.002 0 1240 2.989 0 1377.8 2.977 0 1550 2.967 0 1771.4 2.959 0 2066.7 2.951 0