ITO (tabulated) nm NK 250 2.2279 0.51084 255 2.2577 0.53252 260 2.2872 0.55371 265 2.2951 0.55833 270 2.303 0.56293 275 2.2846 0.54876 280 2.2661 0.53438 285 2.3483 0.43666 290 2.4326 0.34526 295 2.3791 0.26052 300 2.3272 0.17177 305 2.2965 0.12907 310 2.2661 0.085194 315 2.2435 0.063288 320 2.2208 0.040936 325 2.205 0.029445 330 2.1892 0.017788 335 2.1749 0.01194 340 2.1606 0.0060158 345 2.141 0.0033323 350 2.1213 0.00059941 355 2.1126 0 360 2.1039 0 365 2.0954 0 370 2.0869 0 375 2.0797 0 380 2.0725 0 385 2.0661 0 390 2.0596 0 395 2.0512 0 400 2.0428 0 405 2.0327 0 410 2.0225 0 415 2.0149 0 420 2.0073 0 425 2.0024 0 430 1.9974 0 435 1.9932 0 440 1.9889 0 445 1.9844 0 450 1.9799 0 455 1.9754 0 460 1.9709 0 465 1.9666 0 470 1.9623 0 475 1.9578 0 480 1.9533 0 485 1.9496 0 490 1.9458 0 495 1.942 0 500 1.9382 0 505 1.9343 0 510 1.9304 0 515 1.9266 0 520 1.9227 0 525 1.918 0 530 1.9132 0 535 1.9085 0 540 1.9037 0 545 1.8997 0 550 1.8957 0 555 1.8917 0 560 1.8877 0 565 1.8839 0 570 1.8801 0 575 1.8753 0 580 1.8705 0 585 1.8617 0 590 1.8528 0 595 1.8515 0 600 1.8501 0 605 1.846 0 610 1.8419 0 615 1.8378 0 620 1.8337 0 625 1.8295 0 630 1.8253 0 635 1.8202 0 640 1.8151 0 645 1.81 0 650 1.8049 0 655 1.7994 0 660 1.7938 0 665 1.7825 0 670 1.7711 0 675 1.7638 0 680 1.7564 0 685 1.753 0 690 1.7495 0 695 1.7457 0 700 1.7419 0 705 1.7384 0 710 1.7349 0 715 1.7307 0 720 1.7265 0 725 1.7233 0 730 1.7201 0 735 1.7168 0 740 1.7134 0 745 1.7089 0 750 1.7043 0 755 1.6984 0 760 1.6924 0 765 1.6874 0 770 1.6823 0 775 1.6763 0 780 1.6702 0 785 1.6678 0 790 1.6653 0 795 1.6605 0 800 1.6556 0 805 1.6507 0 810 1.6457 0 815 1.6437 0 820 1.6418 0 825 1.6337 0 830 1.6257 0 835 1.6204 0 840 1.6152 0 845 1.6087 0 850 1.6022 0 855 1.5961 0 860 1.59 0 865 1.5852 0 870 1.5804 0 875 1.5753 0 880 1.5701 0 885 1.5648 0 890 1.5595 0 895 1.5541 0 900 1.5486 0 905 1.5427 0 910 1.5368 0 915 1.5315 0 920 1.5261 0 925 1.519 0.0041579 930 1.5119 0.010563 935 1.5059 0.01238 940 1.4999 0.014212 945 1.4937 0.015641 950 1.4874 0.017083 955 1.481 0.014922 960 1.4745 0.012743 965 1.4671 0.01605 970 1.4596 0.019391 975 1.4524 0.021565 980 1.4451 0.023762 985 1.4371 0.028692 990 1.429 0.033678 995 1.4247 0.027033 1000 1.4205 0.020348 1005 1.4103 0.024863 1010 1.4001 0.029444 1015 1.3974 0.02308 1020 1.3948 0.016692 1025 1.3861 0.018184 1030 1.3774 0.019695 1035 1.372 0.021064 1040 1.3666 0.022445 1045 1.3585 0.028173 1050 1.3504 0.033971 1055 1.345 0.027065 1060 1.3397 0.020103 1065 1.3316 0.027091 1070 1.3235 0.034164 1075 1.3144 0.041123 1080 1.3052 0.048181 1085 1.2988 0.039108 1090 1.2925 0.029945 1095 1.2858 0.028291 1100 1.2791 0.026621 1105 1.267 0.027831 1110 1.2548 0.029066 1115 1.2537 0.032452 1120 1.2527 0.035844 1125 1.2458 0.045635 1130 1.2389 0.055534 1135 1.2294 0.049868 1140 1.2199 0.044115 1145 1.207 0.046472 1150 1.1939 0.048886 1155 1.1844 0.050936 1160 1.1748 0.053022 1165 1.1629 0.056853 1170 1.1508 0.060769 1175 1.1566 0.058268 1180 1.1624 0.055794 1185 1.1379 0.053633 1190 1.1129 0.051401 1195 1.0979 0.063794 1200 1.0829 0.076532 1205 1.0753 0.070097 1210 1.0677 0.063571 1215 1.0573 0.070883 1220 1.0469 0.078344 1225 1.0335 0.078938 1230 1.0199 0.079561 1235 1.0075 0.081978 1240 0.9949 0.084468 1245 0.9841 0.087273 1250 0.97319 0.090149 1255 0.96364 0.10171 1260 0.95417 0.1135 1265 0.93183 0.10176 1270 0.90905 0.089492 1275 0.90086 0.095886 1280 0.89266 0.1024 1285 0.88044 0.10742 1290 0.8681 0.11259 1295 0.85325 0.11046 1300 0.83814 0.10829 1305 0.82429 0.11841 1310 0.81038 0.12888 1315 0.79547 0.13616 1320 0.7804 0.14374 1325 0.76677 0.14849 1330 0.75296 0.15344 1335 0.73984 0.15675 1340 0.72653 0.16022 1345 0.71334 0.16364 1350 0.69995 0.16723 1355 0.68561 0.17712 1360 0.67124 0.18744 1365 0.65703 0.20191 1370 0.64303 0.21696 1375 0.63079 0.21393 1380 0.6183 0.21086 1385 0.60457 0.22775 1390 0.59126 0.24526 1395 0.57832 0.26043 1400 0.56575 0.27611 1405 0.55352 0.28777 1410 0.5415 0.29985 1415 0.52973 0.31676 1420 0.51851 0.33408 1425 0.5061 0.33608 1430 0.49354 0.3383 1435 0.48246 0.35518 1440 0.47197 0.37238 1445 0.46231 0.3867 1450 0.4531 0.40123 1455 0.44157 0.41274 1460 0.43034 0.42457 1465 0.42381 0.44788 1470 0.41816 0.47092 1475 0.41107 0.49081 1480 0.40465 0.51055 1485 0.3884 0.50654 1490 0.37174 0.50272 1495 0.3681 0.52599 1500 0.36511 0.54873 1505 0.35991 0.56495 1510 0.35511 0.58101 1515 0.35112 0.59908 1520 0.34753 0.61686 1525 0.34293 0.63428 1530 0.3387 0.65145 1535 0.33842 0.67302 1540 0.33842 0.69405 1545 0.33998 0.71623 1550 0.34171 0.73782 1555 0.32979 0.741 1560 0.3179 0.74437 1565 0.31831 0.76303 1570 0.31885 0.7813 1575 0.31686 0.79585 1580 0.31502 0.8102 1585 0.31294 0.82546 1590 0.31101 0.84051 1595 0.31131 0.85667 1600 0.31169 0.87257 1605 0.31261 0.8876 1610 0.31358 0.9024 1615 0.312 0.91304 1620 0.31048 0.92359 1625 0.30693 0.93527 1630 0.3035 0.94685 1635 0.30601 0.96157 1640 0.30851 0.97608 1645 0.30922 0.98795 1650 0.30995 0.99969 1655 0.30764 1.0125 1660 0.30543 1.0251 1665 0.30821 1.041 1670 0.31097 1.0566 1675 0.31422 1.0709 1680 0.31744 1.085 1685 0.31927 1.102 1690 0.32112 1.1187 1695 0.31085 1.1158 1700 0.30051 1.113