.
, 
( 
) , , :
- , .
:
, . , . , . , , , p /2.
. , .
a = arctg (n2 / n1) ( ) (4.3.10)
: .
a ¹ a, . .
, , . ( ) :
I = I cos 2 a. (4.3.11)
a .
I0, :
I = I 0/2. (4.3.12)
n :
V = c / n, (4.3.13)
( = 3×108 /).
. . , , , , , . , , a ,
|
|
|
a = const×C×l, (4.3.14)
, l .
6. -. 98. , , 1,5. , .
: 2 a = 98,
n 2 = 1,5,
: n 1, V 1, V 2, b.
. ) : :
, a (, , ) , (4.3.10):
a = arctg (n 2/ n 1) = 98/2 = 49,
, tga = n 2/ n 1 n 1 = (n 2/ tga) = 1,3.
) 180 = a + b + g. , g 90,
b = 180 90 a = 41.
b, :
sina / sinb = n 2/ n 1, sinb = (sina× n 1)/ n 2 = 0,654;
b = arcsin (0,654) = 41.
) (4.3.13):
V = c / n,
: V 1 = c / n 1 = 2,3×108 /,
: V 2 = c / n 2 = 2,0×108 /.
: n 1 = 1,3; b = 41; V 1 = 2,3×108 /; V 2 = 2,0×108 /.
7. . a = 45 b = 60. , ?
: a = 45,
b = 60.
: Ia 1/ Ia 2.
. (4.3.11) a b:
I 1 = I cos 2 a,
I 2 = I cos 2 b,
I 1 I 2 , , I , .
, :
Ia 1/ Ia 2 = cos 2 a / cos 2 b = 2.
: .
8. 10%- l 1 15. 20. .
: 1= 10%,
l 2 = 2 l 1,
a 1 = 15,
a 2= 20.
: 2.
. (4.3.14) :
a 1 = const×C 1 ×l 1 = 15,
a 2 = const×C 2 ×l 2 = 20.
: 20/15 = ( 2 × 2 l 1)/( 1× l 1) = 2 2/ 1,
2 = 6,7%.
: 2 = 6,7%.
