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Schaefer–Bergmann Diffraction
Schaefer–Bergmann diffraction is the resulting diffraction pattern of light interacting with sound waves in transparent crystal A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...s or glasses. See also IEEEjournals.aps.orgDOI.org References Diffraction {{crystallography-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diffraction
Diffraction is the deviation of waves from straight-line propagation without any change in their energy due to an obstacle or through an aperture. The diffracting object or aperture effectively becomes a secondary source of the Wave propagation, propagating wave. Diffraction is the same physical effect as Wave interference, interference, but interference is typically applied to superposition of a few waves and the term diffraction is used when many waves are superposed. Italian scientist Francesco Maria Grimaldi coined the word ''diffraction'' and was the first to record accurate observations of the phenomenon in 1660 in science, 1660. In classical physics, the diffraction phenomenon is described by the Huygens–Fresnel principle that treats each point in a propagating wavefront as a collection of individual spherical wavelets. The characteristic pattern is most pronounced when a wave from a Coherence (physics), coherent source (such as a laser) encounters a slit/aperture tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound Waves
In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of to . Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges, allowing some to even hear ultrasounds. Definition Sound is defined as "(a) Oscillation in pressure, stress, particle displacement, particle velocity, etc., propagated in a medium with internal forces (e.g., elastic or viscous), or the superposition of such propagated oscillation. (b) Auditory sensation evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystal
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification. The word ''crystal'' derives from the Ancient Greek word (), meaning both "ice" and " rock crystal", from (), "icy cold, frost". Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Polycrystals include most metals, rocks, ceramics, and ice. A third cat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AOD Loops Schaefer-Bergmann
AOD may refer to: Army * Army Ordnance Department, a forerunner of the British Royal Army Ordnance Corps (RAOC) Arts and entertainment Film * ''Army of Darkness'', a 1993 film, third in the ''Evil Dead'' series Music * Adrenalin O.D., a US hardcore punk band * '' Act of Depression'', the debut album by Underoath * Art of Dying (band), a hard rock band * Assembly of Dust, an American rock band * Aubrey O'Day, an American singer/dancer * Alastair O'Donnell, a British record producer and guitarist Video games * '' Tomb Raider: The Angel of Darkness'', the 6th game in the ''Tomb Raider'' series * '' Art of Defense'', a type of multiplayer game common in '' Command & Conquer Generals: Zero Hour'' * Astro On Demand, a Hong Kong TVB subscription channel * Arsenal of Democracy (video game), a grand strategy wargame * Angels of Death (video game), a Japanese horror adventure game Other * Animation On Display, formerly Anime Overdose and then AOD: The San Francisco Animation Conve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
