Wavelength(nm) n k 250 1.2238 1.7446 260.83 1.2244 1.8052 271.67 1.2186 1.8766 282.5 1.2082 1.9587 293.33 1.2113 2.0478 304.17 1.222 2.1421 315 1.2306 2.2319 325.83 1.2516 2.3242 336.67 1.2702 2.4198 347.5 1.291 2.5128 358.33 1.3101 2.5992 369.17 1.3237 2.6963 380 1.3544 2.8135 390.83 1.414 2.918 401.67 1.4626 3.0167 412.5 1.5169 3.1037 423.33 1.5762 3.1926 434.17 1.6353 3.2793 445 1.6969 3.3627 455.83 1.7669 3.4387 466.67 1.8217 3.509 477.5 1.8837 3.5795 488.33 1.9507 3.6435 499.17 2.0202 3.7154 510 2.0859 3.7772 520.83 2.1465 3.8441 531.67 2.206 3.8923 542.5 2.2781 3.9487 553.33 2.3316 3.9965 564.17 2.4016 4.0501 575 2.4613 4.1014 585.83 2.531 4.1452 596.67 2.5922 4.1877 607.5 2.6648 4.2355 618.33 2.7365 4.2681 629.17 2.7956 4.2973 640 2.8594 4.3356 650.83 2.9161 4.3699 661.67 2.9693 4.399 672.5 3.0299 4.4196 683.33 3.0979 4.4517 694.17 3.151 4.4619 705 3.1983 4.4948 715.83 3.2544 4.5207 726.67 3.3076 4.5614 737.5 3.3525 4.5646 748.33 3.3964 4.5897 759.17 3.4431 4.6094 770 3.4911 4.6434 780.83 3.5424 4.6647 791.67 3.585 4.6916 802.5 3.6279 4.7181 813.33 3.6696 4.7396 824.17 3.7257 4.7706 835 3.7487 4.7787 845.83 3.787 4.817 856.67 3.8029 4.8325 867.5 3.853 4.8628 878.33 3.8858 4.8732 889.17 3.8996 4.892 900 3.8499 4.7659