(l˃˃b)
. . , . ᒺ dx . , φ, 
, dE. φ. , , , dx.
d 
dE
, ,
, 
dE. , 0 x. 0P QP- (), xsinφ. , x0 ωt, , x,
ωt - 
x sinφ,
x sinφ= 
, (
˂ 
)
dE, :
dE = 
cos(ωt xsinφ) 
:
= 
= (- 
)ˣ
ˣ [sin(ωt bsinφ) sin 
] = 
2sin 
cos(
- 
) = 
cos( - 
)
φ, I~ 
.
u = 
= 
; (1)
I(φ) = 
, (1).
= 
= 0
= 
= (ctg u 
) = 0
) φ = 0, u = 0
= 
= 1,
A = 
(sin u ≈ u)
. φ = 0 max
) : tg u = u. г
(ξ u )
u = 0; 
u ≈ 
, m = 1, 2, 3,
=
:
= 
max (2)
min: 
= 0, sin u = 0; u ≠ 0
u = π m
= π m
= 
--min, m ≠ 0, m = 1, 2, 3, (3)
(2) , , 
.
≤ λ (m ≤ 1). .
b .
b>>λ , .
:
φ = 0, A = (
: sin φ = 
, 
= 
= 
, 
~ 
~ (0,21 
)² ≈ 0.045 
, λ . .
|
|
|
, . , .
