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
 
* b l
 
l 
b   
* 
* 

* 
2
0
4 cos
2
I I

 
0
I 
2
m


  ( 0,1,2,3....)
m 
1
2 2
m


 
 
 
 


* 
L
d

   L 

* 

* 

* 
2
( )
F
a
Z

 ; a   
* 

* 
* 


* 
*  E


*  E


E


*  I

 1 2 1 2
2 cos
I I I I 
  
I
 1 2 1 2
2
2 cos
I I I I x


 
    
 
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
*   p
i      
   p
i  

 tan p
i
  
* 
 2
1 cos
I I 
  1
I
  1 0 / 2
I I


* 


  
   
 


2
( )
F
a
Z

 ; a   
     
  


 2
/
F
z a 
 

F
z a
 
    
 
    
 

2 2
0
cos ; cos
I I I
 
  
            
 

w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
  
          
   










         
 

 ( )
i c
 





 AB 
B  C  t  BC t


  A C 
CE
AE BC t

 
EAC  BAC 
i r 
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c
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            
 
  S   


 ' '
a t 
   1
y  2
y 
1 sin (1)
y a t

 
2 sin( ) (2)
y a t
 
  
 1 2
y y y
 
sin sin( )
y a t a t
  
  
S
G
G1
O
D
S2
S1
P
Z
x
y
z
sin sin cos cos sin
y a t a t a t
    
  
sin [1 cos ] cos ( sin ) (3)
y a t t a
   
   
cos (1 cos ) (4)
R a
 
  
sin sin (5)
R a
 
 
sin .cos cos .sin
y R t R t
   
 
sin( ) (6)
y R t
 
  
 R  P 

2 2 2 2 2 2
[cos sin ] [1 cos 2cos sin ]
R a
    
    
2 2
[1] [1 1 2cos ]
R a 
  
2 2 2 2
2 [1 cos ] 2 2cos
2
I R a a


    ï‚Ž
2 2
4 cos (7)
2
I a

 
)
i  
 
cos / 2 1
  
 0,2 ,4 ,6 ,8 ,....,2
     

 ( ) 0, ,2 ,....
x n
  
  ,  0,1,2,3,....
n 
I
 
 2
4a

)
ii 
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2
cos 0
2


 (2 1)
n
 
 
 0,1,2,3.........
n 
0,3 ,5 ,7
   

I 
 0

        
 


 

       
 






 D ' '
d 

d
D

' '
d  D  /
d D

           
  
  1
P  0
I  2
P 
 2
0 cos
I I 
 
  1
P  2
P  1
P  2
P  2
P  3
P 
 2


 

 
 

 3
P 
2 2 2 2
0 0
cos .cos cos .sin
2
I I I

   
 
  
 
 
2
0
sin 2
4
I
I 

w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
  
         
   
 




 S 
 1 2 3 4
, , , ,......
S S S S  t t
 
t t
 
t t
 


 1
V  2
V 
 AB DF CDEFG 
 DF  D  F  F
G D G 
F G ' '
t  1
FG V t
  2
DH V t

 D  DH  H 
GH  D  G GH 

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1 2
N DN  AB  D  ' '
r  DFG 
1
FDG CDN i
     1
sin ........(1)
FG V t
i
DG DG
   1
( )
FG V t


 DHG     0
180
D H G
  
  90
D r
     
0
90 90 90 180
H r G G r
       
 2
sin
DH V t
r
DG DG
   2
( )
DH V t



1 1
2 2
sin
sin
i V t V
r V t V
 
 1
V  2
V 
1
2
sin
sin
i V
r V
  
 
 







 ' '
P 
 0
   2 ,4
   2 
 ,2 .....
x n
  
 
1
S  2
S 
 2 1
S Q S Q 
  
 1 cos
y a t

 
2 cos( 2 ) cos
y a t a t
  
  
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 1 2 cos cos
y y y a t a t
 
   
2 cos
a t


 2 2
(2 ) 4
I a a
 
 2
0
a I
 

 
    
      
/ 2
x 
  / 2
 
 2 1
S Q S Q
 
   
 1 2
cos , cos( )
y a t y a t
  
  
 1 2
y y y
 
cos cos( )
y a t a t
  
   
[cos cos( )]
a t a t
  
  
2 cos( / 2)cos( / 2)
a t
  
 
 2 cos( / 2)
a 

 
  2 cos / 2 0
a  
 0
I  

           
 
' '
S 
 ,
A B ' '
S 
 ,
A B 


    


CRESTS
TROUGHS
SCREEN
P
Q
R K
H
G
F
E
A
B
S
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
  
 n 
2 1
S p S P n
 

2 2
2 2 2 2
2 2 2
2 2
d d
S P S P D x D x xd
   
   
       
   
   
   
   
   
 2 1
2 1
2
( )
( )
xd
S P S P
S P S P
 

 x d
  2 1 2
S P S P D
  
2 1 2
2
d
S P S P x
D
 
2
d
n x
D
  
D
x n
d


S
G
G1
O
D
S2
S1
P
Z
x
y
z
x
d

D
x n
d



 / 2
x 
  / 2



1
2
x n 
 
 
 
 
 2 1
1
2
S P S P n
 
  
 
 
 2 1
xd
S P S P
D
 

1
2
xd
n
D

 
  
 
 

1
2
D
x n
d

 
 
 
 
( )
 

 1 ....................(8)
n n
x x
 
 
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
1 2
n
d
x
D

   2
n
D D D D
x
d d d d
    
    

D
d
 

          
 




A
1
M
2
M





B
O
1
M
2
M
asin

to P'
to P
P'
P
T
L

Fig 13.28

  d  AB 
 ) ) )
OP a b c 
 P 
 1
P  BL
 sin sin
AB a
 
 
( sin )
 


( ) a
 

0
0
  
1
2
n
a


 
 
 
 

n
a

  
a

  
2
a


n
a

  
 1,2,3........
n 

1
2
n
a


 
 
 
 


3
2a

  

2
3

w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
2 2 3
3 3 2
a
a
a

 
ï‚Ž  ï‚Ž 
 
3


2



1
3

           

 

    




0
1.22 0.61
2
f f
r
a a
 
 
 f 2a  


 0
0.61 0.61
;
f
f r
a a
 
 
    

  (2 )
a a 
 d 
1.22
2 sin

 

    sin
   
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m

 589nm            
            

 9
589 589 10
nm m
 
  ï‚Ž
 
9
589 10 m
 
 ï‚Ž  14
5.09 10 Hz
  ï‚Ž
8
8 14
9
3 10
3 10 / 5.093 10
589 10
c
c m s Hz

 
ï‚Ž
 ï‚Ž     ï‚Ž
ï‚Ž
 
14
5.093 10 Hz
  ï‚Ž
8
8
3 10
2.256 10 /
1.33
c
m s


ï‚Ž
   ï‚Ž
8
14
2.256 10
443
5.093 10
c
nm



ï‚Ž
   
ï‚Ž
 



 


            8 1
3.0 10 ms
ï‚Ž 


 
8
8
3 10
2 10 /
1.5
c c
m s
 
 
ï‚Ž
     ï‚Ž
 v r
 
 
v
  v
 
                
     K    /3
       
 1 2
I I I
   

1 2 1 2
2 .cos
R
I I I I I 
  
 
  0
0
 
0
2 .cos0 4
R
I I I II I k
     
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m

3



2
3

  
2
2 .cos
3
R
I I I II


   
1
2 2
2 4
R
k
I I I I

 

    
 
 
  650 , 520
nm nm 
     
 650nm           


  
 9 9
1 2
650 650 10 520 520 10
nm m nm m
  
  ï‚Ž    ï‚Ž
d  D 
 3 , 3 650
D D
n x n nm
d d

    ï‚Ž
n  2 520 , ( 1)
nm n
    1 650nm
 
1 1
( 1) ; 520 ( 1)650;
n n n n
 
   ï‚Ž  
4 5 5
n n
   5
n 
 2 5 520 2600
D D D
x n nm
d d d

  ï‚Ž 
 1m 0
0.2 
 600nm 

 0
1 1 2
0.2 1 , 600 , ?, 4 / 3
D m nm
   
    
2 2
1 1
1 3
4
 
  
  
0 0
2 1
3 3
0.2 0.15
4 4
 
   ï‚Ž 
            
 1.5; tan 1.5
p
i
 
  
1
tan (1.5); 56.3
p p
i i

  
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m
 0
5000A             
           
 0 7
5000 5 10
A m
 
  ï‚Ž
 0
( ) 5000A
 
8
14
7
3 10
6 10
5 10
c
Hz

 
ï‚Ž
   ï‚Ž
ï‚Ž
 0
45
i  
 4mm   400nm          
  
 3 9 7
4 4 10 ; 400 400 10 4 10
a mm m nm m m

  
  ï‚Ž   ï‚Ž  ï‚Ž
2 3 2
7
(4 10 )
40
4 10
F
a
Z m



ï‚Ž
  
ï‚Ž
w
w
w
.
s
a
k
s
h
i
e
d
u
c
a
t
i
o
n
.
c
o
m

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3 wave optics

  • 1.    * b l   l  b    *  *   *  2 0 4 cos 2 I I    0 I  2 m     ( 0,1,2,3....) m  1 2 2 m             *  L d     L   *   *   *  2 ( ) F a Z   ; a    *   *  *    *  *  E   *  E   E   *  I   1 2 1 2 2 cos I I I I     I  1 2 1 2 2 2 cos I I I I x            w w w . s a k s h i e d u c a t i o n . c o m
  • 2. *   p i          p i     tan p i    *   2 1 cos I I    1 I   1 0 / 2 I I   *               2 ( ) F a Z   ; a                2 / F z a     F z a                  2 2 0 cos ; cos I I I                      w w w . s a k s h i e d u c a t i o n . c o m
  • 3.                                           ( ) i c         AB  B  C  t  BC t     A C  CE AE BC t    EAC  BAC  i r  w w w . s a k s h i e d u c a t i o n . c o m
  • 4.                  S       ' ' a t     1 y  2 y  1 sin (1) y a t    2 sin( ) (2) y a t       1 2 y y y   sin sin( ) y a t a t       S G G1 O D S2 S1 P Z x y z sin sin cos cos sin y a t a t a t         sin [1 cos ] cos ( sin ) (3) y a t t a         cos (1 cos ) (4) R a      sin sin (5) R a     sin .cos cos .sin y R t R t       sin( ) (6) y R t       R  P   2 2 2 2 2 2 [cos sin ] [1 cos 2cos sin ] R a           2 2 [1] [1 1 2cos ] R a     2 2 2 2 2 [1 cos ] 2 2cos 2 I R a a       ï‚Ž 2 2 4 cos (7) 2 I a    ) i     cos / 2 1     0,2 ,4 ,6 ,8 ,....,2         ( ) 0, ,2 ,.... x n      ,  0,1,2,3,.... n  I    2 4a  ) ii  w w w . s a k s h i e d u c a t i o n . c o m
  • 5. 2 cos 0 2    (2 1) n      0,1,2,3......... n  0,3 ,5 ,7      I   0                                   D ' ' d   d D  ' ' d  D  / d D                   1 P  0 I  2 P   2 0 cos I I      1 P  2 P  1 P  2 P  2 P  3 P   2            3 P  2 2 2 2 0 0 cos .cos cos .sin 2 I I I               2 0 sin 2 4 I I   w w w . s a k s h i e d u c a t i o n . c o m
  • 6.                         S   1 2 3 4 , , , ,...... S S S S  t t   t t   t t      1 V  2 V   AB DF CDEFG   DF  D  F  F G D G  F G ' ' t  1 FG V t   2 DH V t   D  DH  H  GH  D  G GH   w w w . s a k s h i e d u c a t i o n . c o m
  • 7. 1 2 N DN  AB  D  ' ' r  DFG  1 FDG CDN i      1 sin ........(1) FG V t i DG DG    1 ( ) FG V t    DHG     0 180 D H G      90 D r       0 90 90 90 180 H r G G r          2 sin DH V t r DG DG    2 ( ) DH V t    1 1 2 2 sin sin i V t V r V t V    1 V  2 V  1 2 sin sin i V r V                ' ' P   0    2 ,4    2   ,2 ..... x n      1 S  2 S   2 1 S Q S Q      1 cos y a t    2 cos( 2 ) cos y a t a t       w w w . s a k s h i e d u c a t i o n . c o m
  • 8.  1 2 cos cos y y y a t a t       2 cos a t    2 2 (2 ) 4 I a a    2 0 a I                  / 2 x    / 2    2 1 S Q S Q        1 2 cos , cos( ) y a t y a t        1 2 y y y   cos cos( ) y a t a t        [cos cos( )] a t a t       2 cos( / 2)cos( / 2) a t       2 cos( / 2) a       2 cos / 2 0 a    0 I                  ' ' S   , A B ' ' S   , A B           CRESTS TROUGHS SCREEN P Q R K H G F E A B S w w w . s a k s h i e d u c a t i o n . c o m
  • 9.     n  2 1 S p S P n    2 2 2 2 2 2 2 2 2 2 2 d d S P S P D x D x xd                                      2 1 2 1 2 ( ) ( ) xd S P S P S P S P     x d   2 1 2 S P S P D    2 1 2 2 d S P S P x D   2 d n x D    D x n d   S G G1 O D S2 S1 P Z x y z x d  D x n d     / 2 x    / 2    1 2 x n           2 1 1 2 S P S P n           2 1 xd S P S P D    1 2 xd n D            1 2 D x n d          ( )     1 ....................(8) n n x x     w w w . s a k s h i e d u c a t i o n . c o m
  • 10. 1 2 n d x D     2 n D D D D x d d d d            D d                     A 1 M 2 M      B O 1 M 2 M asin  to P' to P P' P T L  Fig 13.28    d  AB   ) ) ) OP a b c   P   1 P  BL  sin sin AB a     ( sin )     ( ) a    0 0    1 2 n a            n a     a     2 a   n a      1,2,3........ n   1 2 n a             3 2a      2 3  w w w . s a k s h i e d u c a t i o n . c o m
  • 11. 2 2 3 3 3 2 a a a    ï‚Ž  ï‚Ž    3   2    1 3                           0 1.22 0.61 2 f f r a a      f 2a      0 0.61 0.61 ; f f r a a             (2 ) a a   d  1.22 2 sin         sin     w w w . s a k s h i e d u c a t i o n . c o m
  • 12.   589nm                            9 589 589 10 nm m     ï‚Ž   9 589 10 m    ï‚Ž  14 5.09 10 Hz   ï‚Ž 8 8 14 9 3 10 3 10 / 5.093 10 589 10 c c m s Hz    ï‚Ž  ï‚Ž     ï‚Ž ï‚Ž   14 5.093 10 Hz   ï‚Ž 8 8 3 10 2.256 10 / 1.33 c m s   ï‚Ž    ï‚Ž 8 14 2.256 10 443 5.093 10 c nm    ï‚Ž     ï‚Ž                      8 1 3.0 10 ms ï‚Ž      8 8 3 10 2 10 / 1.5 c c m s     ï‚Ž      ï‚Ž  v r     v   v                         K    /3          1 2 I I I      1 2 1 2 2 .cos R I I I I I         0 0   0 2 .cos0 4 R I I I II I k       w w w . s a k s h i e d u c a t i o n . c o m
  • 13.  3    2 3     2 2 .cos 3 R I I I II       1 2 2 2 4 R k I I I I                650 , 520 nm nm         650nm                  9 9 1 2 650 650 10 520 520 10 nm m nm m      ï‚Ž    ï‚Ž d  D   3 , 3 650 D D n x n nm d d      ï‚Ž n  2 520 , ( 1) nm n     1 650nm   1 1 ( 1) ; 520 ( 1)650; n n n n      ï‚Ž   4 5 5 n n    5 n   2 5 520 2600 D D D x n nm d d d    ï‚Ž   1m 0 0.2   600nm    0 1 1 2 0.2 1 , 600 , ?, 4 / 3 D m nm          2 2 1 1 1 3 4         0 0 2 1 3 3 0.2 0.15 4 4      ï‚Ž                1.5; tan 1.5 p i      1 tan (1.5); 56.3 p p i i     w w w . s a k s h i e d u c a t i o n . c o m
  • 14.  0 5000A                           0 7 5000 5 10 A m     ï‚Ž  0 ( ) 5000A   8 14 7 3 10 6 10 5 10 c Hz    ï‚Ž    ï‚Ž ï‚Ž  0 45 i    4mm   400nm               3 9 7 4 4 10 ; 400 400 10 4 10 a mm m nm m m       ï‚Ž   ï‚Ž  ï‚Ž 2 3 2 7 (4 10 ) 40 4 10 F a Z m    ï‚Ž    ï‚Ž w w w . s a k s h i e d u c a t i o n . c o m