1. (n = 2,43) n1. , .17. , .
:
n = 2,42
a = 60
__________
n1 ?
|
. .17 , a = 30 = 60.
a
tg a = ,
n ;
n1 .
.
ϳ
.
³. n1 = 1,40.
2. , ͳ, a = 30, , 10% ?
a = 30
r = 0,1
____________
?
. , o ͳ, (.18) . . . , 10% .
, , ,
I1 = .
1 , . 2, ͳ, . , :
I2 = I1 (1 - r) cos2 a.
a .
I 2 x 1
I2 = I0 (1 - r)2 cos2 a.
.
ϳ
³: 0/I2 = 3,28 .
3. , 0,6, , . , 30?
:
= 0,6
a = 30
__________
?
.
r = +,
max min , .
max min
. (1)
, ,
|
|
, (2)
;
. . .
̳ , ,
. (3)
ϳ (2) (3) (1)
.
n = 1,5.. (5)
.
I1 = In + I... (6)
I2 = In cos2 a + I.. (7)
(6) (7) (5),
.
a,
.
³: 1/2 = 1,23 .
4. j = 40. l = 15 . [a] = 0,665 ×2/. .
:
j = 40
l = 15
[a ] = 0,665 ×2 /.
___________________
?
. () :
j = [a]C l,
[a] ;
;
l .
.
ϳ
= 401 /3.
³: = 401 /3.
Ѳ ²
n n l.
1. :
, υ = ,
w ;
k ;
;
n .
2. :
,
u ;
υ ;
k ;
.
= .
; dl = .
= .
.
3.
,
;
n .
4.
u = υ × ,
= D .
5. :
n = ,
e ;
m .
6.
I = I0 × e-ax,
I I0 ;
a ;
.