(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)
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(No Transcript)
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2.????(diffraction with single slit)
4
(No Transcript)
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?. ????????(further question)

• ????????, ??????????
• ????????

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


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