Wavelength(nm) n k 206.7 1.333 2.457 210.2 1.339 2.531 213.8 1.349 2.6 217.5 1.366 2.688 221.4 1.393 2.794 225.5 1.433 2.912 229.6 1.49 3.049 234 1.567 3.208 238.5 1.677 3.407 243.1 1.86 3.654 248 2.21 3.914 253.1 2.734 3.997 258.3 3.238 3.867 263.8 3.638 3.575 270 3.924 3.223 275.6 4.053 2.803 281.8 4.018 2.449 288.4 3.911 2.206 295.2 3.795 2.059 302.4 3.701 1.976 310 3.633 1.933 317.9 3.588 1.917 326.3 3.568 1.922 335.1 3.572 1.942 344.4 3.602 1.979 354.3 3.668 2.034 364.7 3.792 2.115 375.8 4.084 2.18 387.5 4.379 1.978 400 4.607 1.857 413.3 4.943 1.322 427.6 4.757 0.865 442.9 4.547 0.636 459.3 4.375 0.5 476.9 4.235 0.409 496 4.118 0.341 516.7 4.022 0.288 539.1 3.94 0.242 563.6 3.871 0.202 590.5 3.815 0.165 620 3.759 0.118 652.6 3.7 0.094 688.9 3.662 0.082 729.4 3.635 0.02 775 3.536 0.002 826.7 3.457 0 885.7 3.465 0 953.8 3.429 0 1033.3 3.401 0 1127.3 3.379 0 1240 3.361 0 1377.8 3.346 0 1550 3.334 0 1771.4 3.324 0 2066.7 3.316 0