Wavelength(nm) n k 206.7 1.385 2.42 210.2 1.37 2.485 213.8 1.37 2.565 217.5 1.389 2.669 221.4 1.422 2.785 225.5 1.475 2.915 229.6 1.553 3.059 234 1.661 3.217 238.5 1.805 3.392 243.1 2.007 3.581 248 2.304 3.772 253.1 2.74 3.881 258.3 3.221 3.866 263.8 3.762 3.617 270 4.12 3.107 275.6 4.127 2.616 281.8 4.015 2.318 288.4 3.903 2.142 295.2 3.815 2.038 302.4 3.758 1.978 310 3.729 1.947 317.9 3.725 1.935 326.3 3.75 1.944 335.1 3.822 1.973 344.4 3.977 2.002 354.3 4.224 1.924 364.7 4.429 1.754 375.8 4.665 1.45 387.5 4.649 1.028 400 4.497 0.754 413.3 4.343 0.584 427.6 4.208 0.468 442.9 4.092 0.384 459.3 3.992 0.317 476.9 3.909 0.262 496 3.837 0.205 516.7 3.758 0.157 539.1 3.69 0.126 563.6 3.658 0.063 590.5 3.546 0.005 620 3.467 0 652.6 3.405 0 688.9 3.354 0 729.4 3.313 0 775 3.274 0 826.7 3.237 0 885.7 3.227 0 953.8 3.203 0 1033.3 3.182 0 1127.3 3.163 0 1240 3.147 0 1377.8 3.133 0 1550 3.122 0 1771.4 3.112 0 2066.7 3.103 0