X axis (cm^-1) Real Index (n) 200 1.689 204 1.691 208 1.693 212 1.696 216 1.698 220 1.701 224 1.703 228 1.706 232 1.709 236 1.712 240 1.715 244 1.718 248 1.721 252 1.724 256 1.728 260 1.732 264 1.735 268 1.739 272 1.743 276 1.747 280 1.752 284 1.756 288 1.761 292 1.766 296 1.771 300 1.776 304 1.782 308 1.788 312 1.794 316 1.8 320 1.807 324 1.814 328 1.821 332 1.828 336 1.836 340 1.845 344 1.853 348 1.863 352 1.872 356 1.883 360 1.893 364 1.905 368 1.917 372 1.93 376 1.943 380 1.957 384 1.973 388 1.989 392 2.006 396 2.025 400 2.045 404 2.066 408 2.089 412 2.113 416 2.14 420 2.169 424 2.2 428 2.235 432 2.274 436 2.318 440 2.37 444 2.431 448 2.507 452 2.601 456 2.716 460 2.833 464 2.847 468 2.527 472 1.928 476 1.449 480 1.171 484 1.014 488 0.9184 492 0.8558 496 0.8123 500 0.7815 504 0.7603 508 0.7475 512 0.7424 516 0.7446 520 0.7537 524 0.7689 528 0.7893 532 0.8134 536 0.8401 540 0.8679 544 0.896 548 0.9236 552 0.9503 556 0.9759 560 1 564 1.023 568 1.045 572 1.065 576 1.085 580 1.103 584 1.12 588 1.137 592 1.152 596 1.167 600 1.181 604 1.194 608 1.207 612 1.219 616 1.23 620 1.242 624 1.252 628 1.263 632 1.273 636 1.282 640 1.292 644 1.301 648 1.31 652 1.319 656 1.327 660 1.335 664 1.343 668 1.351 672 1.359 676 1.367 680 1.375 684 1.383 688 1.39 692 1.398 696 1.405 700 1.413 704 1.421 708 1.429 712 1.437 716 1.445 720 1.453 724 1.461 728 1.47 732 1.478 736 1.487 740 1.497 744 1.506 748 1.516 752 1.526 756 1.537 760 1.547 764 1.556 768 1.564 772 1.569 776 1.568 780 1.561 784 1.543 788 1.516 792 1.48 796 1.444 800 1.414 804 1.395 808 1.385 812 1.384 816 1.388 820 1.395 824 1.404 828 1.415 832 1.425 836 1.436 840 1.447 844 1.457 848 1.467 852 1.477 856 1.487 860 1.496 864 1.506 868 1.515 872 1.524 876 1.534 880 1.543 884 1.552 888 1.561 892 1.57 896 1.58 900 1.589 904 1.598 908 1.608 912 1.618 916 1.628 920 1.638 924 1.649 928 1.659 932 1.671 936 1.682 940 1.694 944 1.706 948 1.718 952 1.731 956 1.745 960 1.759 964 1.774 968 1.789 972 1.805 976 1.822 980 1.839 984 1.858 988 1.877 992 1.898 996 1.92 1000 1.943 1004 1.968 1008 1.994 1012 2.022 1016 2.052 1020 2.084 1024 2.119 1028 2.156 1032 2.196 1036 2.239 1040 2.286 1044 2.337 1048 2.391 1052 2.449 1056 2.51 1060 2.572 1064 2.632 1068 2.685 1072 2.721 1076 2.724 1080 2.677 1084 2.562 1088 2.377 1092 2.138 1096 1.881 1100 1.636 1104 1.425 1108 1.251 1112 1.114 1116 1.008 1120 0.9286 1124 0.8702 1128 0.829 1132 0.8014 1136 0.7844 1140 0.775 1144 0.7705 1148 0.7683 1152 0.766 1156 0.7619 1160 0.7549 1164 0.7447 1168 0.7315 1172 0.7161 1176 0.6997 1180 0.6836 1184 0.6688 1188 0.6564 1192 0.647 1196 0.6409 1200 0.638 1204 0.6377 1208 0.6389 1212 0.6398 1216 0.6387 1220 0.6336 1224 0.6236 1228 0.6085 1232 0.5892 1236 0.5676 1240 0.5456 1244 0.5251 1248 0.5074 1252 0.4934 1256 0.4835 1260 0.478 1264 0.4767 1268 0.4795 1272 0.4862 1276 0.4963 1280 0.5093 1284 0.5246 1288 0.5413 1292 0.559 1296 0.5772 1300 0.5953 1304 0.6132 1308 0.6307 1312 0.6476 1316 0.6638 1320 0.6794 1324 0.6944 1328 0.7087 1332 0.7223 1336 0.7354 1340 0.7479 1344 0.7598 1348 0.7712 1352 0.7821 1356 0.7926 1360 0.8026 1364 0.8122 1368 0.8215 1372 0.8303 1376 0.8389 1380 0.8471 1384 0.855 1388 0.8626 1392 0.8699 1396 0.877 1400 0.8838 1404 0.8904 1408 0.8968 1412 0.903 1416 0.909 1420 0.9148 1424 0.9204 1428 0.9258 1432 0.9311 1436 0.9362 1440 0.9412 1444 0.946 1448 0.9507 1452 0.9553 1456 0.9597 1460 0.964 1464 0.9682 1468 0.9723 1472 0.9763 1476 0.9802 1480 0.984 1484 0.9877 1488 0.9913 1492 0.9948 1496 0.9982 1500 1.002 1504 1.005 1508 1.008 1512 1.011 1516 1.014 1520 1.017 1524 1.02 1528 1.023 1532 1.026 1536 1.029 1540 1.031 1544 1.034 1548 1.036 1552 1.039 1556 1.041 1560 1.044 1564 1.046 1568 1.049 1572 1.051 1576 1.053 1580 1.055 1584 1.057 1588 1.06 1592 1.062 1596 1.064 1600 1.066 1604 1.068 1608 1.07 1612 1.071 1616 1.073 1620 1.075 1624 1.077 1628 1.079 1632 1.08 1636 1.082 1640 1.084 1644 1.086 1648 1.087 1652 1.089 1656 1.09 1660 1.092 1664 1.093 1668 1.095 1672 1.096 1676 1.098 1680 1.099 1684 1.101 1688 1.102 1692 1.104 1696 1.105 1700 1.106 1704 1.108 1708 1.109 1712 1.11 1716 1.111 1720 1.113 1724 1.114 1728 1.115 1732 1.116 1736 1.117 1740 1.119 1744 1.12 1748 1.121 1752 1.122 1756 1.123 1760 1.124 1764 1.125 1768 1.126 1772 1.127 1776 1.128 1780 1.129 1784 1.13 1788 1.131 1792 1.132 1796 1.133 1800 1.134 1804 1.135 1808 1.136 1812 1.137 1816 1.138 1820 1.139 1824 1.14 1828 1.141 1832 1.141 1836 1.142 1840 1.143 1844 1.144 1848 1.145 1852 1.146 1856 1.146 1860 1.147 1864 1.148 1868 1.149 1872 1.15 1876 1.15 1880 1.151 1884 1.152 1888 1.153 1892 1.153 1896 1.154 1900 1.155 1904 1.155 1908 1.156 1912 1.157 1916 1.157 1920 1.158 1924 1.159 1928 1.159 1932 1.16 1936 1.161 1940 1.161 1944 1.162 1948 1.163 1952 1.163 1956 1.164 1960 1.165 1964 1.165 1968 1.166 1972 1.166 1976 1.167 1980 1.167 1984 1.168 1988 1.169 1992 1.169 1996 1.17 2000 1.17