Wavelength(nm) n k 206.7 1.366 2.418 210.2 1.363 2.49 213.8 1.364 2.572 217.5 1.379 2.666 221.4 1.412 2.78 225.5 1.462 2.903 229.6 1.532 3.045 234 1.632 3.199 238.5 1.763 3.378 243.1 1.951 3.579 248 2.25 3.787 253.1 2.686 3.904 258.3 3.187 3.899 263.8 3.731 3.645 270 4.072 3.147 275.6 4.107 2.668 281.8 4.009 2.351 288.4 3.894 2.159 295.2 3.798 2.046 302.4 3.73 1.98 310 3.688 1.945 317.9 3.671 1.933 326.3 3.68 1.942 335.1 3.724 1.969 344.4 3.822 2.017 354.3 4.034 2.049 364.7 4.294 1.922 375.8 4.525 1.748 387.5 4.753 1.34 400 4.654 0.926 413.3 4.483 0.684 427.6 4.328 0.534 442.9 4.195 0.429 459.3 4.081 0.355 476.9 3.985 0.292 496 3.903 0.245 516.7 3.838 0.205 539.1 3.761 0.164 563.6 3.696 0.133 590.5 3.665 0.088 620 3.558 0.002 652.6 3.477 0 688.9 3.417 0 729.4 3.368 0 775 3.329 0 826.7 3.283 0 885.7 3.288 0 953.8 3.261 0 1033.3 3.238 0 1127.3 3.219 0 1240 3.202 0 1377.8 3.188 0 1550 3.176 0 1771.4 3.166 0 2066.7 3.157 0