![]() ![]() The views expressed in the project do not necessarily reflect the views of The Office for Learning and Teaching. A beam of X-rays contacts a crystal with an angle of incidence. 3.1Single-slit diffraction 3.2Diffraction grating 3.3Circular aperture 3.4General aperture 3.5Propagation of a laser beam 3.6Diffraction-limited imaging 3.7Speckle patterns 3.8Babinet's principle 3. The atomic planes of the crystal act on the X-rays in exactly the same manner as does a uniformly ruled diffraction grating on a beam of light. Support for this project website has been provided by The Office for Learning and Teaching, which is part of the Department of Industry, Innovation, Science, Research and Tertiary Education. X-ray diffraction, phenomenon in which the atoms of a crystal, by virtue of their uniform spacing, cause an interference pattern of the waves present in an incident beam of X-rays. Single slit diffraction, diffraction gratings.ĭownloads (thumbnails at 50% of size of animation) Recreating a hologram: coherence beam and hologram plate. On tilting the crystal holder to one side or the. X-ray diffraction.įorming a hologram: beam splitter, object and reference beams, interference at the film. When the sound wave is exactly normal to the incident light, the diffraction pattern disappears altogether. Diffraction requires wavelengths less than 0.1 nm. ![]() The atomic lattice as a diffraction grating. We will look at the wave nature of light in a set of experiments where diffraction and interference patterns are produced when laser light is incident on. Image What is diffraction If you shine a bright light at an object, it produces a diffraction pattern as it leaves the sample. Learn the detailed behavior of light as it encounters objects. When is the eye diffraction limited? The resolution of telescopes. Refraction (bending), dispersion (splitting into colors) and diffraction (spreading out) are ways light reacts when interrupted. Resolving two point sources: Rayleigh's criterion. ![]() Diffraction pattern from a circular aperture. waves, including sound waves, water waves, and electromagnetic waves such as visible light, x-rays and radio waves. Rayleigh criterion and the Airy disc: Aperture and resolutionĬircular apertures in optics. A modern recreation of Arago's experiment. The bright dot at the centre of the shadow: Poisson's argument against the wave nature of light. The hydrogen spectrum and the origins of quantum mechanics. Continuous spectra and line spectra, absorption and emission spectra. Young's experiment with finite slit width: I q shows both interference and diffraction effects.Ī light-hearted discussion to illustrate why we don't notice quantum interference in everyday life.Īdding phasors with 2, 3, 4 and many slits: Diffraction gratings. Young's experiment with finite slits.ĭiffraction from a single slit:Huygens' construction. X-ray, neutron and electron diffractionĭiffraction from a single slit. Shadows and beams with water waves of short wavelength. Diffraction, shadows, beams, Huygens' construction.ĭiffraction of light and sound. ![]()
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