( ) (. 3.4). . , . θ, . (. 3.11), αn
. . 60.
90, 60, (i), ( 3.39).
, θ = 90ο
i = S(1-cosθ)U(90) = SU(90)
θ = 60ο
i = S(1-0,5)U(60) = 0,5SU(60)
U(60)=2U(90); .. 60 .
E = 0,5U(60)-´= U(90)-´
θ = 90ο E = ´, 60 ΔE = E - ´ = U(90)
| e | 60 2U(90).
, , ; e ; .
, 3-. ( 70-80, 50-60).
3-, . .
.
, f T, , , - [ 4 ].