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(Multiple beam interference and diffraction gratings)

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(Multiple beam interference and diffraction gratings) (Summary on interference and diffraction gratings) – PowerPoint PPT presentation

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Title: (Multiple beam interference and diffraction gratings)


1
???????? (Multiple beam interference and
diffraction gratings)
  1. ?????????(Summary on interference and
    diffraction gratings)

1.????(interference with double slits)
2
(No Transcript)
3
2.????(diffraction with single slit)
4
(No Transcript)
5
?. ????????(further question)
  • ????????, ??????????
  • ????????

2. ?????????
Think!
6
N2
7
N5
?????----?????
??
????
8
(Multiple beam interference)
?. ?????
1.?????(principle and device)
?????(The difference of optical path)
???(Phase difference)
9
2.????(The calculation of intensity)
10
3.???????(The feature of interference pattern)
1.??? ???
(Maxima)


2.???
?
?
???,
(Minima)
11
3.??
(Spectral lines)
N5
12
???????N-1???, N-2????
13
4.???
(Secondary maxima)
?N???,
??,
14
?.????(gratings)
???? Grating constant
dab
????
where
????
15
1.??????(intensity)
16
(No Transcript)
17
2.????????(feature in detail)
????????????????????????? ?????. ????????? ????.
3.?????(The kind of grating)
Transmission grating, reflection grating
18
????(Spectrum of gratings )
4.?????----
A diffraction grating is the tool of choice for
separating the colors in incident light.
19
?????????????, ??????, ??????
Reading materials
M. Born and E. Wolf, Principles of Optics
Homework Page 278 11-6,
11-10
20
??!
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