Wavelength(nm) n k 206.7 1.377 2.426 210.2 1.366 2.493 213.8 1.365 2.581 217.5 1.375 2.688 221.4 1.407 2.809 225.5 1.462 2.946 229.6 1.545 3.098 234 1.662 3.269 238.5 1.829 3.445 243.1 2.049 3.62 248 2.354 3.788 253.1 2.777 3.873 258.3 3.214 3.853 263.8 3.758 3.637 270 4.144 3.15 275.6 4.142 2.645 281.8 4.028 2.365 288.4 3.932 2.206 295.2 3.868 2.111 302.4 3.835 2.055 310 3.836 2.023 317.9 3.868 2.009 326.3 3.947 2.006 335.1 4.103 1.993 344.4 4.319 1.877 354.3 4.502 1.678 364.7 4.665 1.357 375.8 4.615 0.98 387.5 4.471 0.735 400 4.325 0.574 413.3 4.196 0.46 427.6 4.084 0.374 442.9 3.987 0.307 459.3 3.906 0.245 476.9 3.823 0.184 496 3.746 0.129 516.7 3.696 0.069 539.1 3.595 0.002 563.6 3.5 0 590.5 3.425 0 620 3.361 0 652.6 3.306 0 688.9 3.261 0 729.4 3.225 0 775 3.188 0 826.7 3.153 0 885.7 3.162 0 953.8 3.139 0 1033.3 3.12 0 1127.3 3.103 0 1240 3.088 0 1377.8 3.075 0 1550 3.064 0 1771.4 3.054 0 2066.7 3.046 0