ΔL | 𝜆^2 /ΔL | ng | ng1 | ng2 | ng3 | ng4 |
100 | 0.024025 | 4.26 | 5.639671362 | 5.652941176 | 5.761390887 | 5.775240385 |
200 | 0.0120125 | 4.25 | 2.819835681 | 2.826470588 | 2.880695444 | 2.887620192 |
300 | 0.008008333 | 4.17 | 1.879890454 | 1.884313725 | 1.920463629 | 1.925080128 |
400 | 0.00600625 | 4.16 | 1.40991784 | 1.413235294 | 1.440347722 | 1.443810096 |