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1. Diffraction: Diffraction is defined as the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. The diffracting object or aperture effectively becomes a secondary source ... (Physics) [100%] 2023-05-12 [Diffraction] [Physical phenomena]...
2. Diffraction: Diffraction occurs “when waves pass through small openings, around obstacles, or past sharp edges. When an opaque object is placed between a point source of light and a screen, no sharp boundary exists on the screen between a shadowed region ... [100%] 2023-02-15 [Optics]
3. Diffraction: Diffraction is a physical phenomenon due to which waves passing through small openings will tend to 'bend' towards the edges. Diffraction applies to virtually all kinds of waves including sound, light, and other electromagnetic waves (such as radio waves). [100%] 2022-08-27
4. Diffraction: Diffraction is the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. The diffracting object or aperture effectively becomes a secondary source of the ... (Phenomenon of the motion of waves) [100%] 2024-04-07 [Diffraction] [Physical phenomena]...
5. Diffraction gratings: Born in the eighteenth century (Rittenhouse, 1786), the diffraction grating has been one of the most valuable instruments in the history of science and technology. At one extreme, it has enabled the study of celestial bodies. [70%] 2021-12-24 [Optics]
6. Diffraction efficiency: Diffraction efficiency is the performance of diffractive optical elements – especially diffraction gratings – in terms of power throughput. It's a measure of how much optical power is diffracted into a designated direction compared to the power incident onto the diffractive ... (Physics) [70%] 2023-04-30 [Diffraction]
7. Diffraction grating: In optics, a diffraction grating is an optical component with a periodic structure that diffracts light into several beams travelling in different directions (i.e., different diffraction angles). The emerging coloration is a form of structural coloration. (Physics) [70%] 2023-09-17 [Diffraction] [Optical components]...
8. Diffraction tomography: Diffraction tomography is an inverse scattering technique used to find the shape of a scattering object by illuminating it with probing waves and recording the reflections. It is based on the diffraction slice theorem and assumes that the scatterer is ... [70%] 2022-09-26 [Scattering theory]
9. Diffraction formalism: Diffraction processes affecting waves are amenable to quantitative description and analysis. Such treatments are applied to a wave passing through one or more slits whose width is specified as a proportion of the wavelength. (Physics) [70%] 2023-10-25 [Equations of physics] [Diffraction]...
10. Diffraction spike: Diffraction spikes are lines radiating from bright light sources, causing what is known as the starburst effect or sunstars in photographs and in vision. They are artifacts caused by light diffracting around the support vanes of the secondary mirror in ... (Astronomy) [70%] 2023-11-03 [Astrophotography] [Science of photography]...
11. Diffraction grating: In optics, a diffraction grating is an optical component with a regular pattern, which splits (diffracts) light into several beams travelling in different directions. The directions of these beams depend on the spacing of the grating and the wavelength of ... [70%] 2023-02-04
12. Diffraction standard: In crystallography, a diffraction standard, or calibration crystal, is a crystal used to calibrate an X-ray spectrometer to an absolute X-ray energy scale. Quartz or silicon crystals are typically used. [70%] 2023-02-20 [Measurement]
13. Diffraction tomography: Diffraction tomography is an inverse scattering technique used to find the shape of a scattering object by illuminating it with probing waves and recording the reflections. It is based on the diffraction slice theorem and assumes that the scatterer is ... (Physics) [70%] 2023-02-14
14. Diffraction in time: Diffraction in time is a phenomenon associated with the quantum dynamics of suddenly released matter waves initially confined in a region of space. It was introduced in 1952 by Marcos Moshinsky with the shutter problem. (Physics) [57%] 2022-12-13 [Diffraction]
15. Diffraction Of Light: When light proceeding from a small source falls upon an opaque object, a shadow is cast upon a screen situated behind the obstacle, and this shadow is found to be bordered by alternations of brightness and darkness, known as “diffraction ... [57%] 2022-09-02
16. International Centre for Diffraction Data: The International Centre for Diffraction Data (ICDD) maintains a database of powder diffraction patterns, the Powder Diffraction File (PDF), including the d-spacings (related to angle of diffraction) and relative intensities of observable diffraction peaks. Patterns may be experimentally determined ... (Organization) [44%] 2023-12-16 [Crystallography organizations] [Diffraction]...
17. International Centre for Diffraction Data: The International Centre for Diffraction Data (ICDD) maintains a database of powder diffraction patterns, the Powder Diffraction File (PDF), including the d-spacings (related to angle of diffraction) and relative intensities of observable diffraction peaks. Patterns may be experimentally determined ... [44%] 2022-12-06 [Crystallography organizations] [Diffraction]...
18. Neutron diffraction: Neutron diffraction or elastic neutron scattering is the application of neutron scattering to the determination of the atomic and/or magnetic structure of a material. A sample to be examined is placed in a beam of thermal or cold neutrons ... (Physics) [70%] 2022-07-22 [Diffraction] [Neutron scattering]...
19. Fraunhofer diffraction: In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when plane waves are incident on a diffracting object, and the diffraction pattern is viewed at a sufficiently long distance (a distance satisfying Fraunhofer condition) from ... (Physics) [70%] 2023-12-28 [Diffraction] [Physical optics]...
20. Kinematic diffraction: Kinematic diffraction is the approach to study diffraction phenomena by neglecting multiple scattering. For linear wave equations, it thus consists in summing the contribution of the partial waves emanating from the different scatterers, where only the incident field drives the ... (Physics) [70%] 2023-07-21 [Diffraction]
21. Engineering diffraction: Engineering diffraction refers to a sub-field of neutron scattering which investigates microstructural features that influence the mechanical properties of materials. These include. (Engineering) [70%] 2023-06-10 [Neutron-related techniques] [Scattering]...
22. Atmospheric diffraction: Atmospheric diffraction is manifested in the following principal ways: However, if the object has a diameter greater than the acoustic wavelength, a 'sound shadow' is cast behind the object where the sound is inaudible. (Note: some sound may be propagated ... (Physics) [70%] 2023-03-03 [Diffraction] [Atmosphere]...
23. Bragg diffraction: The Bragg formulation of X-ray diffraction (also referred to as Bragg diffraction) was first proposed by William Lawrence Bragg and William Henry Bragg in 1913 in response to their discovery that crystalline solids produced surprising patterns of reflected X ... [70%] 2023-06-23 [Condensed matter physics] [Diffraction]...
24. Powder diffraction: Powder diffraction is a scientific technique using X-ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. An instrument dedicated to performing such powder measurements is called a powder diffractometer. (Physics) [70%] 2023-04-29 [Diffraction] [Neutron-related techniques]...
25. Electron diffraction: Electron diffraction is a general term for phenomena associated with changes in the direction of electron beams due to elastic interactions with atoms. Close to the atoms the changes are described as Fresnel diffraction; far away they are called Fraunhofer ... (Bending of electron beams due to electrostatic interactions with matter) [70%] 2023-10-30 [Crystallography] [Diffraction]...
26. Fresnel diffraction: In optics, the Fresnel diffraction equation for near-field diffraction is an approximation of the Kirchhoff–Fresnel diffraction that can be applied to the propagation of waves in the near field. It is used to calculate the diffraction pattern created ... (Physics) [70%] 2021-12-29 [Diffraction]
27. Electron diffraction: Electron diffraction refers to the bending of electron beams around atomic structures. This behaviour, typical for waves, is applicable to electrons due to the wave–particle duality stating that electrons behave as both particles and waves. (Physics) [70%] 2023-01-29 [Diffraction] [Electron]...
28. Powder diffraction: Powder diffraction is a scientific technique using X-ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. An instrument dedicated to performing such powder measurements is called a powder diffractometer. (Experimental method in X-ray diffraction) [70%] 2024-02-18 [Diffraction] [Neutron-related techniques]...
29. Gas electron diffraction: Gas electron diffraction (GED) is one of the applications of electron diffraction techniques. The target of this method is the determination of the structure of gaseous molecules, i.e., the geometrical arrangement of the atoms from which a molecule is ... (Physics) [57%] 2023-11-27 [Diffraction]
30. Selected area diffraction: Selected area (electron) diffraction (abbreviated as SAD or SAED), is a crystallographic experimental technique typically performed using a transmission electron microscope (TEM). It is a specific case of electron diffraction used primarily in material science and solid state physics as ... (Physics) [57%] 2023-12-19 [Materials science] [Diffraction]...
31. Electron backscatter diffraction: Electron backscatter diffraction (EBSD) is a scanning electron microscopy (SEM) technique used to study the crystallographic structure of materials. EBSD is carried out in a scanning electron microscope equipped with an EBSD detector comprising at least a phosphorescent screen, a ... (Physics) [57%] 2023-10-11 [Diffraction] [Scientific techniques]...
32. Schaefer–Bergmann diffraction: Schaefer–Bergmann diffraction is the resulting diffraction pattern of light interacting with sound waves in transparent crystals or glasses. (Physics) [57%] 2024-01-05 [Diffraction]
33. Diffraction-limited system: The resolution of an optical imaging system – a microscope, telescope, or camera – can be limited by factors such as imperfections in the lenses or misalignment. However, there is a principal limit to the resolution of any optical system, due to ... (Astronomy) [57%] 2023-05-04 [Diffraction] [Telescopes]...
34. Fraunhofer diffraction equation: In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance from the diffracting object, and also when it is viewed at the focal plane of an ... (Mathematical explanation of far field diffraction) [57%] 2022-09-13 [Diffraction] [Fourier analysis]...