1. SchoolDD.com
18
www.schoolDD.com

2. 18
F F F F F F F
18.1 F F F
FF
1. F ( E) F F ( B)
2. F F ( B) F ( E)
3. F
4. F F F F F
F
Y
Z
F
X
F F F
- F F
- F F F F F
- F F (3 x 108 m/s)
18.2 F
R
S
A B G D
F F
F F www.schoolDD.com 1

3. F F F F F F
F A F F B F F
F F F
F F
B B F A F F G
F F F F F G spark
F F F F F G
F F F D F F D F F
spark F F D
F G
18.3 F F
i
AC v
F F F F
F F F F
F F F
- F F F F
18.3 F
F F F F F F
F F F F F F
F 3.0 x 108 m/s F F
F F
F
(Hz)
0 10 102 103 104 105 106 107 108 109 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
F
F F www.schoolDD.com 2

4. 18.3.1
F F F 106 109 F F F
F F (modulate) F2
AM ( Amplitude Modulation)
F
F AM F F (
F ) F F
F
- F AM F F
- AM F 530 - 1600 F F F F
F F
- F F F AM
FM ( Frequency Modulation)
F
F FM F F
- F FM F
- FM F 88 - 108 F
F F www.schoolDD.com 3

5. F
F AM F2
F FM F F F FM F
F F F F F FM F F F
18.3.2 F
F F 108 F F F FM F
F F F F F F F
F F 80 F
F F F F F
F F F
F F
F F F F
F F www.schoolDD.com 4

6. 18.3.3
F F F 109 1011 F
F F F F F F F F
F F F F
18.3.4
F F F 1011 1014 F F F
F F F F
F F F F F F F
F F F F
18.3.5
F 4 x 1014 8 x 1014 F
400 700 F F F F F
F F F F F F
F F F F F F F F F
F F F F F F
F F F F F F F F F
18.3.6 F( LASER)
F F F F F F
F F F F F
1. F F F F F , DVD
2. F F F F
3. F (holography)
4.
5. F F
6. F
7.
8.
9.
10. F
F F www.schoolDD.com 5

7. 18.6.7 ( F )
F F F F 1015 1018 F F F
F F F F
F F F
F F F F F F F
F F
18.6.8 F
F F F 1017 1021 F F F
F F F F F F
F F F F F
F F FF
18.6.9
F F F F F
F F
18.7 F
F F F F F
F
F F F F F
F F
Y
E
Z
X E
F F
F F www.schoolDD.com 6

8. 18.7.1
Y
Z
. F . F F Y
Z F F
F F F F
F
F F F .
F F F FF F F
F F F F (Polarization)
1. F F F
F F
. F FF F F F F . F F F F F F F
F
. F F FF F F1 F F F
F F F
F F
2. F
F F F F F F F
F F
F F www.schoolDD.com 7

9. B
90°
2
F
F F
F F F F F
F F F F
F F F B F F 90°
F F F F F F F
F (polarizing angle) F
F F n 1
F n1 sin 1 = n2 sin 2 ( )
1= B , 2 = 90 = 90 B , = B ( = F )
F F 1 sin B = n sin (90 B)
sin B = n cos B
tan B = n
-1
B = tan n
F F F B = tan-1 n F F
F 1
F F 100.0 F
F F
F F 3x 10 8 m/s
v=f
= =
= 3.0 m Ans
F F www.schoolDD.com 8

10. F 2
F F F 48° F F
F F
n1 = 1
48° 48°
42° n2 = ?
F F n1 sin 1 = n2 sin 2
1 sin 48 = n2 sin 42
= n2
n2 = = tan 48 = 1.11 Ans
F F F F
F 3
F F F 37°
n1 = 1
c = 48°
n2 = ?
n1 sin 1 = n2 sin 2
n1 sin c = n2 sin 90
1 sin 37 = n2 (1.0)
n2 = sin 37 = = 0.6
F F www.schoolDD.com 9

11. F
n1 = 1
B=?
B B
90 - B n2 = 0.6
n1 sin 1 =n2 sin 2
n1 sin B = n2 sin (90 - B)
1 sin B = n2 cos B
n2 = tan B
0.6 = tan B
-1
B = tan 0.6 = 30.96° Ans
“
1
....
”
F F www.schoolDD.com 10