Wavelength(nm) n k 258.3 2.184 2.402 263.8 2.183 2.406 269.53 2.186 2.404 275.52 2.192 2.396 281.78 2.201 2.383 288.34 2.215 2.367 295.2 2.232 2.348 302.4 2.253 2.327 309.96 2.278 2.306 317.91 2.305 2.285 326.28 2.334 2.267 335.1 2.362 2.252 344.4 2.386 2.242 354.24 2.407 2.238 364.66 2.426 2.24 375.71 2.444 2.248 387.45 2.469 2.262 399.95 2.507 2.28 413.28 2.56 2.299 427.54 2.631 2.313 442.8 2.718 2.316 459.2 2.813 2.3 476.87 2.911 2.258 495.94 3 2.188 516.6 3.071 2.106 539.07 3.115 2.028 563.57 3.124 1.954 590.41 3.094 1.884 619.93 3.024 1.817 652.55 2.917 1.755 688.81 2.778 1.703 729.32 2.614 1.676 774.91 2.432 1.701 826.57 2.238 1.811 885.61 2.037 2.038 953.73 1.834 2.404 1033.21 1.63 2.912 1127.14 1.428 3.56 1239.85 1.227 4.346