Wavelength(nm) n k 206.7 1.311 2.457 210.2 1.318 2.538 213.8 1.33 2.608 217.5 1.345 2.698 221.4 1.371 2.8 225.5 1.408 2.921 229.6 1.459 3.059 234 1.531 3.223 238.5 1.634 3.433 243.1 1.819 3.704 248 2.207 3.983 253.1 2.772 4.036 258.3 3.267 3.846 263.8 3.611 3.536 270 3.829 3.229 275.6 4.01 2.876 281.8 4.017 2.507 288.4 3.922 2.24 295.2 3.801 2.074 302.4 3.697 1.983 310 3.618 1.937 317.9 3.566 1.92 326.3 3.537 1.924 335.1 3.532 1.945 344.4 3.552 1.979 354.3 3.601 2.03 364.7 3.69 2.1 375.8 3.864 2.203 387.5 4.253 2.187 400 4.46 1.949 413.3 4.838 1.836 427.6 4.968 1.126 442.9 4.725 0.763 459.3 4.518 0.575 476.9 4.353 0.462 496 4.22 0.382 516.7 4.111 0.32 539.1 4.018 0.276 563.6 3.94 0.237 590.5 3.876 0.199 620 3.82 0.171 652.6 3.775 0.127 688.9 3.716 0.099 729.4 3.678 0.082 775 3.661 0.059 826.7 3.572 0 885.7 3.53 0 953.8 3.484 0 1033.3 3.452 0 1127.3 3.428 0 1240 3.41 0 1377.8 3.395 0 1550 3.383 0 1771.4 3.374 0 2066.7 3.366 0