(3)
| χ = ∫∞λ | N dλ | = | N | · | Bλ − Aλ | ; |
| (a2 + λ) (b2 + λ) P | abc | a2 − b2 |
(4)
and at the surface λ = 0,
| R = − | [ (1/a2 + 1/b2) · N/abc · (B0 − A0)/(a2 − b2) ] − N/abc · 1/a2b2 | , |
| 1/b2 − 1/a2 |
(5)
| N | = R | 1/b2 − 1/a2 | , |
| abc | 1/a2b2 − [ (1/a2 + 1/b2) · (B0 − A0) / (a2 − b2) ] |
(6)
| = R | (a2 − b2)2 / (a2 + b2) | |
| (a2 − b2) / (a2 + b2) − (B0 − A0) |