, . , 0.05 , . , , 0.05. , 0º 331 /, 20º 343/.
2.4. . X .
() = Acos ( t-kx+j),
= -A ksin ( t-kx+j), =-k Acos ( t-kx+j), = -A w sin(ωt+φ)
- A cos ( t-kx+j).
= , = , .. .
, . , , , = .
, , ,Y,Z,t . + + = , = ,
= + + - . ,
, () = Acos ( t-kx+j). , , E = , H = .
2.5. () .
(x,t) = Asin ( t-kx+j). , , . = () ,
( - , - ).
= = ()2∆V
, e = - .
= + = A cos ( t-kx+j) + A cos ( t-kx+j) = A cos ( t-kx+j) (rw +Ek = A cos ( t-kx+j) rw .
,
= w = A cos ( t-kx+j)rw = A rw .
. , , cos .
<w> = A rw =2π2A2rf .
, ρ. (, , ).
|
|
, , , . . .
() S , . - ( = 1/). , . . . dS d = = J dS cos (, ), . , , , / . , . S =∫ j d S.
.
, I. , , .
I = v = =
<w> =2π2A2f2
I = <w>v = 2π2 A f v. , , , r , I S = I1S1, S = 4πR = 4πR I = I .
2.7. (, )
1)
2) ,
3) ( ), .
2.7.1. .
. w, ,
w = w0 e -αx,
α - (. . 1), x - , .
1. .
0.015
0.025
0.2
(2.5 ) 0.78