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Файл:шпора 2010, 2ой семестр (Ташлыкова-Бушкевич) [5353 вопросов] / 44 когерентн. интерф
.txt яю >35@5=B=>ABL - A>3;0A>20==>5 ?@>B5:0=85 2> 2@5<5=8 8 ?@>AB@0=AB25 =5A:>;L:8E :>;510B5;L=KE 8;8 2>;=>2KE ?@>F5AA>2.
CABL 2 =5:>B>@CN B>G:C ?@>AB@0=AB20 ?@8E>4OB >B @07=KE 8AB>G=8:>2 425 <>=>E@><0B8G5A:85 A25B>2K5 2>;=K. !>3;0A=> ?@8=F8?C AC?5@?>78F88: E ( @57) = E 1 * c o s ( ><530* t + D81 ) + E 2 * c o s ( ><530* t + D82 )
A;CG05 AC?5@?>78F88 :>35@5=B=KE 2>;= 8=B5=A82=>ABL @57C;LB8@CNI53> :>;510=8O >?@545;O5BAO :0: I ( @57) = I 1 + I 2 + 2 * :>@5=L( I 1 * I 2 ) * c o s ( 45;LB0)
@8 @0A?@>AB@0=5=88 :>35@5=B=KE 2>;= 2 A@540E A @07;8G=K<8 ?>:070B5;O<8 ?@5;><;5=8O @07=>ABL >?B8G5A:8E 4;8= ?CB59 L 2 8 L 1 , ?@>E>48<KE 2>;=0<8, =07K205BAO >?B8G5A:>9 @07=>ABLN E>40: 45;LB0= L 2 - L 1
=B5@D5@5=F8O A25B0 MB> A;>65=85 2 ?@>AB@0=AB25 42CE 8;8 =5A:>;L:8E :>35@. A25B>2KE 2>;=, ?@8 :>B>@>< 2 @07=KE B>G:0E ?@>AB@0=AB20 ?>;CG05BAO CA8;5=85 8;8 >A;01;5=85 0<?;8BC4K @57C;LB8@CNI59 2>;=K.
#A;>285 8=B5@D. <0:A8<C<0: 5A;8 >?B8G5A:0O @07=>ABL E>40 2>;= @02=0 G5B=><C G8A;C ?>;C2>;= 2 20:CC<5 ( F5;><C G8A;C 4;8= 2>;=) , B> :>;510=8O, 2>71C6405<K5 >158<8 2>;=0<8 2 B>G:5 , 1C4CB ?@>8AE>48BL 2 D075 B@5C3>;L=8:= m * ( ;O<140 =C;52>5) , 345 m - F5;>5 G8A;>; - @07=>ABL D07 :>35@. 2>;= @02=0 G5B=><C G8A;C ?8
#A;>285 8=B5@D5@5=F8>==>3> <8=8<C<0: 5A;8 >?B8G5A:0O @07=>ABL E>40 2>;= @02=0 =5G5B=><C G8A;C ?>;C2>;= 2 20:CC<5, B> >1@07CNBAO 8=B5@D5@5=F8>==K5 <8=8<C<K; B@5C3>;L=8:= ( 2 * m + 1 ) * ( ;O<140 =C;52>5/ 2 ) ; - @07=>ABL D07 :>35@. 2>;= @02=0 =5G5B=><C G8A;C ?8
5<>=>E@><0B8G5A:89 A25B <>6=> ?@54AB028BL 2 2845 A>2>:C?=>AB8 A<5=ONI8E 4@C3 4@C30 :>@>B:8E 30@<>=8G5A:8E 8<?C;LA>2 87;CG05<KE 0B><0<8 2>;=>2KE FC3>2. !@54=OO ?@>4>;68B5;L=>ABL >4=>3> 2>;=>2>3> FC30 =07K205BAO 2@5<5=5< :>35@5=B=>AB8.
;8=0 :>35@5=B=>AB8 MB> @0AAB>O=85, =0 :>B>@>5 ?5@5<5I05BAO 2>;=0 70 2@5<O :>35@5=B=>AB8. 20:CC<5 4;8=0 :>35@5=B=>AB8 @02=0 l ( :>3) = A* ( B0C( :>3) ) . ;8=5 :>35@5=B=>AB8 A>>B25BAB2C5B <0:A8<0;L=> 2>7<>6=K9 ?>@O4>: 8=B5@D5@5=F88, =0G8=0O A :>B>@>3> ?>;>AK 8AG570NB.
CABL 2 =5:>B>@CN B>G:C ?@>AB@0=AB20 ?@8E>4OB >B @07=KE 8AB>G=8:>2 425 <>=>E@><0B8G5A:85 A25B>2K5 2>;=K. !>3;0A=> ?@8=F8?C AC?5@?>78F88: E ( @57) = E 1 * c o s ( ><530* t + D81 ) + E 2 * c o s ( ><530* t + D82 )
A;CG05 AC?5@?>78F88 :>35@5=B=KE 2>;= 8=B5=A82=>ABL @57C;LB8@CNI53> :>;510=8O >?@545;O5BAO :0: I ( @57) = I 1 + I 2 + 2 * :>@5=L( I 1 * I 2 ) * c o s ( 45;LB0)
@8 @0A?@>AB@0=5=88 :>35@5=B=KE 2>;= 2 A@540E A @07;8G=K<8 ?>:070B5;O<8 ?@5;><;5=8O @07=>ABL >?B8G5A:8E 4;8= ?CB59 L 2 8 L 1 , ?@>E>48<KE 2>;=0<8, =07K205BAO >?B8G5A:>9 @07=>ABLN E>40: 45;LB0= L 2 - L 1
=B5@D5@5=F8O A25B0 MB> A;>65=85 2 ?@>AB@0=AB25 42CE 8;8 =5A:>;L:8E :>35@. A25B>2KE 2>;=, ?@8 :>B>@>< 2 @07=KE B>G:0E ?@>AB@0=AB20 ?>;CG05BAO CA8;5=85 8;8 >A;01;5=85 0<?;8BC4K @57C;LB8@CNI59 2>;=K.
#A;>285 8=B5@D. <0:A8<C<0: 5A;8 >?B8G5A:0O @07=>ABL E>40 2>;= @02=0 G5B=><C G8A;C ?>;C2>;= 2 20:CC<5 ( F5;><C G8A;C 4;8= 2>;=) , B> :>;510=8O, 2>71C6405<K5 >158<8 2>;=0<8 2 B>G:5 , 1C4CB ?@>8AE>48BL 2 D075 B@5C3>;L=8:= m * ( ;O<140 =C;52>5) , 345 m - F5;>5 G8A;>; - @07=>ABL D07 :>35@. 2>;= @02=0 G5B=><C G8A;C ?8
#A;>285 8=B5@D5@5=F8>==>3> <8=8<C<0: 5A;8 >?B8G5A:0O @07=>ABL E>40 2>;= @02=0 =5G5B=><C G8A;C ?>;C2>;= 2 20:CC<5, B> >1@07CNBAO 8=B5@D5@5=F8>==K5 <8=8<C<K; B@5C3>;L=8:= ( 2 * m + 1 ) * ( ;O<140 =C;52>5/ 2 ) ; - @07=>ABL D07 :>35@. 2>;= @02=0 =5G5B=><C G8A;C ?8
5<>=>E@><0B8G5A:89 A25B <>6=> ?@54AB028BL 2 2845 A>2>:C?=>AB8 A<5=ONI8E 4@C3 4@C30 :>@>B:8E 30@<>=8G5A:8E 8<?C;LA>2 87;CG05<KE 0B><0<8 2>;=>2KE FC3>2. !@54=OO ?@>4>;68B5;L=>ABL >4=>3> 2>;=>2>3> FC30 =07K205BAO 2@5<5=5< :>35@5=B=>AB8.
;8=0 :>35@5=B=>AB8 MB> @0AAB>O=85, =0 :>B>@>5 ?5@5<5I05BAO 2>;=0 70 2@5<O :>35@5=B=>AB8. 20:CC<5 4;8=0 :>35@5=B=>AB8 @02=0 l ( :>3) = A* ( B0C( :>3) ) . ;8=5 :>35@5=B=>AB8 A>>B25BAB2C5B <0:A8<0;L=> 2>7<>6=K9 ?>@O4>: 8=B5@D5@5=F88, =0G8=0O A :>B>@>3> ?>;>AK 8AG570NB.
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