chapter 38 serway & beichner 6 th ed.. fig 38-4a, p.1207 diffraction
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![Page 1: Chapter 38 Serway & Beichner 6 th Ed.. Fig 38-4a, p.1207 Diffraction](https://reader037.vdocuments.pub/reader037/viewer/2022102702/56649d645503460f94a46c2c/html5/thumbnails/1.jpg)
Chapter 38Serway & Beichner 6th Ed.
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Fig 38-4a, p.1207
DiffractionDiffraction
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D = a
P
wave front
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Phasor Model
)()( 110 NEEEE NT
sin
2d
trkAE sinWhere we assume:
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sin2
2
)2sin(
2
)2sin(
2
a
II
E
oT
T
E
Note: β = and ER = Eθ
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)()( 110 NEEEE NT
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These produces the sameinterference patterns!
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a
b
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D
22.1~
Diffraction from Circular Aperture
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02
8II sad
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Single Slit Double Slit
Diffraction and Interference
a d
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1 0.5 0 0.5 1y
0
0.2
0.4
0.6
0.8
1
langiS
Single Slit Diffraction vs Aperature Size
y/y o
x
= .633 ma = 5.0 ma = 2.5 m
2
0 2/
2sin
yy
sin
2 a
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1 0.5 0 0.5 1y
0
0.2
0.4
0.6
0.8
1
langiS
Single Slit Diffraction vs Wavelength
Diffraction also depends on wavelength!
a = 2.5 m
x
y/y o
2
0 2/
2sin
yy
sin
2 a
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-0.4 -0.2 0 0.2 0.4y
0
1
2
3
4langiS
Double Slit ; 0.633 m; a2.5 m;d5 m
-0.4 -0.2 0 0.2 0.4y
0
1
2
3
4
langiS
Double Slit ; 0.633 m; a2.5 m;d10 m
MissingPeaks!!
Diffraction Modifies the Interference Pattern!!
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-0.4 -0.2 0 0.2 0.4y
0
100
200
300
400
500
600
langiS
N Slits ; 0.633 m; a2.5 m;d5 m; N5
-0.4 -0.2 0 0.2 0.4y
0
200
400
600
800
1000
1200
langiS
N Slits ; 0.633 m; a2.5 m;d5 m; N6
-0.4 -0.2 0 0.2 0.4y
0
2107
4107
6107
8107
langiS
N Slits ; 0.633 m; a2.5 m;d5 m; N8
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Primary
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Fig 38-29, p.1226
Polarization: Defined as the direction of E-field!
Linear, Circular, Elliptical
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Fig 38-28, p.1225
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Circular Polarization
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Elliptical Polarization
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Polarizers
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Fig 38-32, p.1228
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Fig 38-33, p.1229
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Fig 38-34, p.1229