| 词汇 | 衍射 |
| 释义 | 衍射 Unlike a normal lens, which compresses or changes the actual shape of a light wave through diffraction, a time lens magnifies or compresses the time of a light wave through dispersion. As a tsunami gets close to shore a lot of non-linear stuff starts to happen to the waves, which means dispersion and diffraction. And the result is a diffraction pattern that produces a series of rings. Electrons, being waves as well as particles, produce a diffraction pattern when transmitted through a crystal. No conventional lens can beat that“ diffraction limit.” And there is a technique known as x- ray diffraction. Rosalind Franklin, a chemist whose X- ray diffusion photographs of DNA molecules showed their essential structure and paved the way for the trio's work, received nothing. The robotic crystallization process made plenty of crystals, but they did not diffract very well. The crystals diffracted the light, but they also fell apart, which limited the amount of data they could get from one crystal. The researchers managed all this by tapping what are known as diffraction fringes to create an object’s3-D shape. Natural and heat-treated single crystals of albite were studied by electron paramagnetic resonance EPR and X-ray diffraction. The other is a novel diffraction technique known as holographic projection. Each round of iteration brings the model structure into better agreement with the experimental data; when the difference between the two is negligible the diffraction pattern is said to be “ solved.” You remember this. Now, this is diffraction. Here, a researcher projects a laser through a flexible silk film with a diffractive optic pattern to create an image of an eye. He points out that a similar spin- filtering of photons due to Bragg diffraction has been seen in cholesteric liquid crystals, which also have a helical structure. They also abandoned using any corrective lenses, firing the X-ray pulse through a pinhole and then collecting the diffracted rays after they pass through the sample. They did this in Bell Laboratories, and they found that, in fact, the electrons did diffract. The light from the lines is directed to the appropriate eye using either tiny lenses or diffraction gratings over each pixelthe dots of which the picture is composed. The diagram does not consider additional constraints: decreased resolution due to diffraction and increased susceptibility to fixed pattern noise with longer exposures. We offer ruled and holographic diffraction gratings. The researchers analysed the sizes and structures of ash particles using a variety of techniques, such as atomic force microscopy, scanning electron microscopy and X-ray diffraction. One is a system that tracks the whereabouts of the audience's heads. The other is a novel diffraction technique, known as holographic projection. The structure and composition of samples were analysed by Rutherford backscattering spectroscopy RBS, X-ray diffractionXRD and Raman spectra. This is known as a grazing iridescence and is brought about because of light diffraction. These included tree- ring dating of the oak panel on which the portrait is painted, X-ray analysis and infra-red photography. Only by using wave- like properties as an explanation can you describe diffraction. Why is it that we're never observing this, for example, why is it the table doesn't diffract as we bring it through the door? The pigment obtained was characterised by means of X-ray diffraction, particle size distribution measurement and scanning electron microscopy. The samples obtained were characterized by X— ray powder diffraction analysis, Chemical analysis, and infrared spectra, etc. |
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