Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana...
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![Page 1: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/1.jpg)
Indiana University P575 1
DNA Diffraction
![Page 2: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/2.jpg)
X-ray diffraction and biomolecular structure
Indiana University P575 2
DNA x-ray diffraction Diffraction by tungsten coil
![Page 3: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/3.jpg)
Light is an electromagnetic wave:
Indiana University P575 3
Diffraction Refraction
Hygens’ Principle:
Every point on a wavefront can be considered a secondary point source. Wavelets emitted by all points on the wavefront interfere with each other to produce the final traveling wave.
![Page 4: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/4.jpg)
Diffraction of plane wave at large slit
Indiana University P575 4
![Page 5: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/5.jpg)
Diffraction of plane wave at small slit
Indiana University P575 5
![Page 6: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/6.jpg)
Indiana University P575 6
MIT Ripple Tank Demo
Water Waves
![Page 7: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/7.jpg)
Superposition
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Superposition of sinusoidal waves
![Page 8: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/8.jpg)
Single slit diffraction
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Alternations regions of high/low intensity:
Constructive/Destructive Interference
path length difference,
nconstructive
n destructive
(n = 0, 1, 2, …)
![Page 9: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/9.jpg)
Double slit interference
Indiana University P575 9
d sin = m constructive interference
d sin = (m+1/2) destructive interference
(m=0,1,2,….)
![Page 10: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/10.jpg)
Diffraction grating
Indiana University P575 10
![Page 11: Indiana University P5751 DNA Diffraction. X-ray diffraction and biomolecular structure Indiana University P5752 DNA x-ray diffractionDiffraction by tungsten.](https://reader030.fdocuments.net/reader030/viewer/2022032722/56649f435503460f94c63dac/html5/thumbnails/11.jpg)
Convolution, pictorially
Indiana University P575 11